31953480 has 64 divisors (see below), whose sum is σ = 103239360. Its totient is φ = 7865088.

The previous prime is 31953457. The next prime is 31953491. The reversal of 31953480 is 8435913.

It is a super-2 number, since 2×31953480² = 2042049768220800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8682 + ... + 11801.

It is an arithmetic number, because the mean of its divisors is an integer number (1613115).

Almost surely, 2^31953480 is an apocalyptic number.

31953480 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31953480 is an abundant number, since it is smaller than the sum of its proper divisors (71285880).

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

31953480 is a wasteful number, since it uses less digits than its factorization.

31953480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20510 (or 20506 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 31953480 is about 5652.7409280808. The cubic root of 31953480 is about 317.3262901637.

The spelling of 31953480 in words is "thirty-one million, nine hundred fifty-three thousand, four hundred eighty".