31427408 has 10 divisors (see below), whose sum is σ = 60890634. Its totient is φ = 15713696.

The previous prime is 31427399. The next prime is 31427411. The reversal of 31427408 is 80472413.

It can be written as a sum of positive squares in only one way, i.e., 30558784 + 868624 = 5528^2 + 932^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 982091 + ... + 982122.

Almost surely, 2^31427408 is an apocalyptic number.

It is an amenable number.

31427408 is a deficient number, since it is larger than the sum of its proper divisors (29463226).

31427408 is a wasteful number, since it uses less digits than its factorization.

31427408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1964221 (or 1964215 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 31427408 is about 5606.0153406854. The cubic root of 31427408 is about 315.5751916043.

The spelling of 31427408 in words is "thirty-one million, four hundred twenty-seven thousand, four hundred eight".