31013984 has 48 divisors (see below), whose sum is σ = 66080448. Its totient is φ = 14272512.

The previous prime is 31013971. The next prime is 31013993. The reversal of 31013984 is 48931013.

It is a congruent number.

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, 24962 + ... + 26174.

It is an arithmetic number, because the mean of its divisors is an integer number (1376676).

Almost surely, 2^31013984 is an apocalyptic number.

31013984 is a gapful number since it is divisible by the number (34) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33040224).

31013984 is an abundant number, since it is smaller than the sum of its proper divisors (35066464).

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

31013984 is a wasteful number, since it uses less digits than its factorization.

31013984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287 (or 1279 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 29.

The square root of 31013984 is about 5569.0200215119. The cubic root of 31013984 is about 314.1852936943.

Adding to 31013984 its reverse (48931013), we get a palindrome (79944997).

It can be divided in two parts, 310 and 13984, that multiplied together give a triangular number (4335040 = T₂₉₄₄).

The spelling of 31013984 in words is "thirty-one million, thirteen thousand, nine hundred eighty-four".