31485732 has 24 divisors (see below), whose sum is σ = 73922016. Its totient is φ = 10430208.

The previous prime is 31485721. The next prime is 31485737. The reversal of 31485732 is 23758413.

It is a junction number, because it is equal to n+sod(n) for n = 31485693 and 31485702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31485737) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6093 + ... + 10004.

It is an arithmetic number, because the mean of its divisors is an integer number (3080084).

Almost surely, 2^31485732 is an apocalyptic number.

It is an amenable number.

31485732 is an abundant number, since it is smaller than the sum of its proper divisors (42436284).

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

31485732 is a wasteful number, since it uses less digits than its factorization.

31485732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16267 (or 16265 counting only the distinct ones).

The product of its digits is 20160, while the sum is 33.

The square root of 31485732 is about 5611.2148417255. The cubic root of 31485732 is about 315.7702891796.

The spelling of 31485732 in words is "thirty-one million, four hundred eighty-five thousand, seven hundred thirty-two".