31493400 has 48 divisors (see below), whose sum is σ = 97631400. Its totient is φ = 8398080.

The previous prime is 31493377. The next prime is 31493419. The reversal of 31493400 is 439413.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25645 + ... + 26844.

Almost surely, 2^31493400 is an apocalyptic number.

31493400 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31493400 is an abundant number, since it is smaller than the sum of its proper divisors (66138000).

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

31493400 is a wasteful number, since it uses less digits than its factorization.

31493400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52508 (or 52499 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 24.

The square root of 31493400 is about 5611.8980746268. The cubic root of 31493400 is about 315.7959212134.

The spelling of 31493400 in words is "thirty-one million, four hundred ninety-three thousand, four hundred".