30925986 has 48 divisors (see below), whose sum is σ = 76561344. Its totient is φ = 8154432.

The previous prime is 30925933. The next prime is 30925997. The reversal of 30925986 is 68952903.

It is a super-2 number, since 2×30925986² = 1912833220144392, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 4920 + ... + 9276.

It is an arithmetic number, because the mean of its divisors is an integer number (1595028).

Almost surely, 2^30925986 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30925986, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38280672).

30925986 is an abundant number, since it is smaller than the sum of its proper divisors (45635358).

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

30925986 is a wasteful number, since it uses less digits than its factorization.

30925986 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4395 (or 4382 counting only the distinct ones).

The product of its (nonzero) digits is 116640, while the sum is 42.

The square root of 30925986 is about 5561.1137373731. The cubic root of 30925986 is about 313.8878593968.

The spelling of 30925986 in words is "thirty million, nine hundred twenty-five thousand, nine hundred eighty-six".