31020404 has 12 divisors (see below), whose sum is σ = 54341700. Its totient is φ = 15494208.

The previous prime is 31020373. The next prime is 31020449. The reversal of 31020404 is 40402013.

It can be written as a sum of positive squares in 2 ways, for example, as 1317904 + 29702500 = 1148^2 + 5450^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1082 + ... + 7950.

It is an arithmetic number, because the mean of its divisors is an integer number (4528475).

Almost surely, 2^31020404 is an apocalyptic number.

It is an amenable number.

31020404 is a deficient number, since it is larger than the sum of its proper divisors (23321296).

31020404 is a wasteful number, since it uses less digits than its factorization.

31020404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8002 (or 8000 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 31020404 is about 5569.5963947130. The cubic root of 31020404 is about 314.2069713394.

Adding to 31020404 its reverse (40402013), we get a palindrome (71422417).

The spelling of 31020404 in words is "thirty-one million, twenty thousand, four hundred four".