31489738 has 48 divisors (see below), whose sum is σ = 58351104. Its totient is φ = 12467520.

The previous prime is 31489723. The next prime is 31489747. The reversal of 31489738 is 83798413.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 31489694 and 31489703.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 594120 + ... + 594172.

It is an arithmetic number, because the mean of its divisors is an integer number (1215648).

Almost surely, 2^31489738 is an apocalyptic number.

31489738 is a deficient number, since it is larger than the sum of its proper divisors (26861366).

31489738 is a wasteful number, since it uses less digits than its factorization.

31489738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167 (or 130 counting only the distinct ones).

The product of its digits is 145152, while the sum is 43.

The square root of 31489738 is about 5611.5717940698. The cubic root of 31489738 is about 315.7836806647.

The spelling of 31489738 in words is "thirty-one million, four hundred eighty-nine thousand, seven hundred thirty-eight".