31000328 has 8 divisors (see below), whose sum is σ = 58125630. Its totient is φ = 15500160.

The previous prime is 31000313. The next prime is 31000337. The reversal of 31000328 is 82300013.

It can be written as a sum of positive squares in only one way, i.e., 23059204 + 7941124 = 4802^2 + 2818^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×31000328² = 1922040672215168, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1937513 + ... + 1937528.

Almost surely, 2^31000328 is an apocalyptic number.

It is an amenable number.

31000328 is a deficient number, since it is larger than the sum of its proper divisors (27125302).

31000328 is a wasteful number, since it uses less digits than its factorization.

31000328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3875047 (or 3875043 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 17.

The square root of 31000328 is about 5567.7938180216. The cubic root of 31000328 is about 314.1391731630.

The spelling of 31000328 in words is "thirty-one million, three hundred twenty-eight", and thus it is an aban number.