31603480 has 16 divisors (see below), whose sum is σ = 71107920. Its totient is φ = 12641376.

The previous prime is 31603427. The next prime is 31603487. The reversal of 31603480 is 8430613.

It is a super-2 number, since 2×31603480² = 1997559896220800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31603487) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 395004 + ... + 395083.

It is an arithmetic number, because the mean of its divisors is an integer number (4444245).

Almost surely, 2^31603480 is an apocalyptic number.

It is an amenable number.

31603480 is an abundant number, since it is smaller than the sum of its proper divisors (39504440).

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

31603480 is a wasteful number, since it uses less digits than its factorization.

31603480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 790098 (or 790094 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 31603480 is about 5621.6972526097. The cubic root of 31603480 is about 316.1634309234.

The spelling of 31603480 in words is "thirty-one million, six hundred three thousand, four hundred eighty".