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30280054 = 278292609
BaseRepresentation
bin111001110000…
…0100101110110
32002222101102111
41303200211312
530222430204
63001001234
7515243020
oct163404566
962871374
1030280054
1116101942
12a18321a
1363725bc
144043010
1529d1d04
hex1ce0976

30280054 has 16 divisors (see below), whose sum is σ = 51991200. Its totient is φ = 12956544.

The previous prime is 30280051. The next prime is 30280057. The reversal of 30280054 is 45008203.

It is an interprime number because it is at equal distance from previous prime (30280051) and next prime (30280057).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30280051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10302 + ... + 12910.

It is an arithmetic number, because the mean of its divisors is an integer number (3249450).

Almost surely, 230280054 is an apocalyptic number.

30280054 is a deficient number, since it is larger than the sum of its proper divisors (21711146).

30280054 is a wasteful number, since it uses less digits than its factorization.

30280054 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3447.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 30280054 is about 5502.7315035353. The cubic root of 30280054 is about 311.6871384394.

Adding to 30280054 its reverse (45008203), we get a palindrome (75288257).

The spelling of 30280054 in words is "thirty million, two hundred eighty thousand, fifty-four".

Divisors: 1 2 7 14 829 1658 2609 5218 5803 11606 18263 36526 2162861 4325722 15140027 30280054