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30642708 = 2232553559
BaseRepresentation
bin111010011100…
…1001000010100
32010122210220010
41310321020110
530321031313
63012440220
7521313225
oct164711024
963583803
1030642708
111632a358
12a319070
13646b6a5
1440d924c
152a544c3
hex1d39214

30642708 has 12 divisors (see below), whose sum is σ = 71499680. Its totient is φ = 10214232.

The previous prime is 30642707. The next prime is 30642709. The reversal of 30642708 is 80724603.

It is an interprime number because it is at equal distance from previous prime (30642707) and next prime (30642709).

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30642701) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1276768 + ... + 1276791.

Almost surely, 230642708 is an apocalyptic number.

It is an amenable number.

30642708 is an abundant number, since it is smaller than the sum of its proper divisors (40856972).

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

30642708 is a wasteful number, since it uses less digits than its factorization.

30642708 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2553566 (or 2553564 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 30.

The square root of 30642708 is about 5535.5856058777. The cubic root of 30642708 is about 312.9265275461.

The spelling of 30642708 in words is "thirty million, six hundred forty-two thousand, seven hundred eight".

Divisors: 1 2 3 4 6 12 2553559 5107118 7660677 10214236 15321354 30642708