31457472 has 28 divisors (see below), whose sum is σ = 83231736. Its totient is φ = 10485760.

The previous prime is 31457471. The next prime is 31457479. The reversal of 31457472 is 27475413.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (31457471) 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, 81729 + ... + 82112.

It is an arithmetic number, because the mean of its divisors is an integer number (2972562).

Almost surely, 2^31457472 is an apocalyptic number.

31457472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31457472 is an abundant number, since it is smaller than the sum of its proper divisors (51774264).

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

31457472 is a wasteful number, since it uses less digits than its factorization.

31457472 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163856 (or 163846 counting only the distinct ones).

The product of its digits is 23520, while the sum is 33.

The square root of 31457472 is about 5608.6961051567. The cubic root of 31457472 is about 315.6757877557.

The spelling of 31457472 in words is "thirty-one million, four hundred fifty-seven thousand, four hundred seventy-two".