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30906741 = 315976451
BaseRepresentation
bin111010111100…
…1100101110101
32011011020002010
41311321211311
530403003431
63022234433
7523463055
oct165714565
964136063
1030906741
111649a768
12a425a19
136531918
144167565
152aa7846
hex1d79975

30906741 has 8 divisors (see below), whose sum is σ = 41241184. Its totient is φ = 20588400.

The previous prime is 30906719. The next prime is 30906767. The reversal of 30906741 is 14760903.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 30906741 - 25 = 30906709 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30906699 and 30906708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30906341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1566 + ... + 8016.

It is an arithmetic number, because the mean of its divisors is an integer number (5155148).

Almost surely, 230906741 is an apocalyptic number.

It is an amenable number.

30906741 is a deficient number, since it is larger than the sum of its proper divisors (10334443).

30906741 is a wasteful number, since it uses less digits than its factorization.

30906741 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8051.

The product of its (nonzero) digits is 4536, while the sum is 30.

The square root of 30906741 is about 5559.3831492352. The cubic root of 30906741 is about 313.8227358970.

The spelling of 30906741 in words is "thirty million, nine hundred six thousand, seven hundred forty-one".

Divisors: 1 3 1597 4791 6451 19353 10302247 30906741