31425904 has 10 divisors (see below), whose sum is σ = 60887720. Its totient is φ = 15712944.

The previous prime is 31425883. The next prime is 31425907. The reversal of 31425904 is 40952413.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31425907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982044 + ... + 982075.

It is an arithmetic number, because the mean of its divisors is an integer number (6088772).

Almost surely, 2^31425904 is an apocalyptic number.

It is an amenable number.

31425904 is a deficient number, since it is larger than the sum of its proper divisors (29461816).

31425904 is a wasteful number, since it uses less digits than its factorization.

31425904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964127 (or 1964121 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 31425904 is about 5605.8811974568. The cubic root of 31425904 is about 315.5701574352.

The spelling of 31425904 in words is "thirty-one million, four hundred twenty-five thousand, nine hundred four".