31428032 has 28 divisors (see below), whose sum is σ = 62544960. Its totient is φ = 15668736.

The previous prime is 31428031. The next prime is 31428037. The reversal of 31428032 is 23082413.

It is a junction number, because it is equal to n+sod(n) for n = 31427989 and 31428007.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31428031) 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, 38444 + ... + 39252.

Almost surely, 2^31428032 is an apocalyptic number.

31428032 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31428032 is a deficient number, since it is larger than the sum of its proper divisors (31116928).

31428032 is an equidigital number, since it uses as much as digits as its factorization.

31428032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1428 (or 1418 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 31428032 is about 5606.0709949126. The cubic root of 31428032 is about 315.5772802018.

The spelling of 31428032 in words is "thirty-one million, four hundred twenty-eight thousand, thirty-two".