30708725 has 12 divisors (see below), whose sum is σ = 38193984. Its totient is φ = 24492720.

The previous prime is 30708721. The next prime is 30708739. The reversal of 30708725 is 52780703.

It is not a de Polignac number, because 30708725 - 2² = 30708721 is a prime.

It is a super-2 number, since 2×30708725² = 1886051582251250, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 30708691 and 30708700.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30708721) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7502 + ... + 10848.

It is an arithmetic number, because the mean of its divisors is an integer number (3182832).

Almost surely, 2^30708725 is an apocalyptic number.

It is an amenable number.

30708725 is a deficient number, since it is larger than the sum of its proper divisors (7485259).

30708725 is a wasteful number, since it uses less digits than its factorization.

30708725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3724 (or 3719 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 32.

The square root of 30708725 is about 5541.5453620809. The cubic root of 30708725 is about 313.1510905175.

The spelling of 30708725 in words is "thirty million, seven hundred eight thousand, seven hundred twenty-five".