31488396 has 24 divisors (see below), whose sum is σ = 77340480. Its totient is φ = 9943632.

The previous prime is 31488371. The next prime is 31488407. The reversal of 31488396 is 69388413.

It is a happy number.

It is a nialpdrome in base 12.

It is a zygodrome in base 2.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 68826 + ... + 69281.

It is an arithmetic number, because the mean of its divisors is an integer number (3222520).

Almost surely, 2^31488396 is an apocalyptic number.

It is an amenable number.

31488396 is an abundant number, since it is smaller than the sum of its proper divisors (45852084).

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

31488396 is a wasteful number, since it uses less digits than its factorization.

31488396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 138133 (or 138131 counting only the distinct ones).

The product of its digits is 124416, while the sum is 42.

The square root of 31488396 is about 5611.4522184547. The cubic root of 31488396 is about 315.7791946771.

The spelling of 31488396 in words is "thirty-one million, four hundred eighty-eight thousand, three hundred ninety-six".