31798864 has 10 divisors (see below), whose sum is σ = 61610330. Its totient is φ = 15899424.

The previous prime is 31798861. The next prime is 31798889. The reversal of 31798864 is 46889713.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 16744464 + 15054400 = 4092^2 + 3880^2 .

It is a super-2 number, since 2×31798864² = 2022335503380992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31798861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 993699 + ... + 993730.

It is an arithmetic number, because the mean of its divisors is an integer number (6161033).

Almost surely, 2^31798864 is an apocalyptic number.

It is an amenable number.

31798864 is a deficient number, since it is larger than the sum of its proper divisors (29811466).

31798864 is a wasteful number, since it uses less digits than its factorization.

31798864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987437 (or 1987431 counting only the distinct ones).

The product of its digits is 290304, while the sum is 46.

The square root of 31798864 is about 5639.0481466290. The cubic root of 31798864 is about 316.8136379022.

The spelling of 31798864 in words is "thirty-one million, seven hundred ninety-eight thousand, eight hundred sixty-four".