31473984 has 28 divisors (see below), whose sum is σ = 83275424. Its totient is φ = 10491264.

The previous prime is 31473977. The next prime is 31473991. The reversal of 31473984 is 48937413.

It is an interprime number because it is at equal distance from previous prime (31473977) and next prime (31473991).

It is a super-2 number, since 2×31473984² = 1981223337664512, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81772 + ... + 82155.

Almost surely, 2^31473984 is an apocalyptic number.

It is an amenable number.

31473984 is an abundant number, since it is smaller than the sum of its proper divisors (51801440).

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

31473984 is a wasteful number, since it uses less digits than its factorization.

31473984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 163942 (or 163932 counting only the distinct ones).

The product of its digits is 72576, while the sum is 39.

The square root of 31473984 is about 5610.1679119256. The cubic root of 31473984 is about 315.7310107445.

The spelling of 31473984 in words is "thirty-one million, four hundred seventy-three thousand, nine hundred eighty-four".