30986725 has 24 divisors (see below), whose sum is σ = 47907648. Its totient is φ = 19315200.

The previous prime is 30986717. The next prime is 30986731. The reversal of 30986725 is 52768903.

It is not a de Polignac number, because 30986725 - 2³ = 30986717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6124 + ... + 9973.

It is an arithmetic number, because the mean of its divisors is an integer number (1996152).

Almost surely, 2^30986725 is an apocalyptic number.

30986725 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

30986725 is a deficient number, since it is larger than the sum of its proper divisors (16920923).

30986725 is a wasteful number, since it uses less digits than its factorization.

30986725 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16125 (or 16120 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 40.

The square root of 30986725 is about 5566.5721049853. The cubic root of 30986725 is about 314.0932181615.

The spelling of 30986725 in words is "thirty million, nine hundred eighty-six thousand, seven hundred twenty-five".