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30405108 = 22329412131
BaseRepresentation
bin111001111111…
…1000111110100
32010012201222010
41303333013310
530240430413
63003404220
7516303426
oct163770764
963181863
1030405108
1116187898
12a223670
1363b74b6
144076816
152a08dc3
hex1cff1f4

30405108 has 48 divisors (see below), whose sum is σ = 75216960. Its totient is φ = 9542400.

The previous prime is 30405107. The next prime is 30405127. The reversal of 30405108 is 80150403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30405101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13203 + ... + 15333.

It is an arithmetic number, because the mean of its divisors is an integer number (1567020).

Almost surely, 230405108 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30405108, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37608480).

30405108 is an abundant number, since it is smaller than the sum of its proper divisors (44811852).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30405108 is a wasteful number, since it uses less digits than its factorization.

30405108 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2208 (or 2206 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 30405108 is about 5514.0826979653. The cubic root of 30405108 is about 312.1156293967.

The spelling of 30405108 in words is "thirty million, four hundred five thousand, one hundred eight".

Divisors: 1 2 3 4 6 12 29 41 58 82 87 116 123 164 174 246 348 492 1189 2131 2378 3567 4262 4756 6393 7134 8524 12786 14268 25572 61799 87371 123598 174742 185397 247196 262113 349484 370794 524226 741588 1048452 2533759 5067518 7601277 10135036 15202554 30405108