31799748 has 12 divisors (see below), whose sum is σ = 74199440. Its totient is φ = 10599912.

The previous prime is 31799743. The next prime is 31799759. The reversal of 31799748 is 84799713.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×31799748² = 2022447945727008, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31799697 and 31799706.

It is not an unprimeable number, because it can be changed into a prime (31799743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1324978 + ... + 1325001.

Almost surely, 2^31799748 is an apocalyptic number.

It is an amenable number.

31799748 is an abundant number, since it is smaller than the sum of its proper divisors (42399692).

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

31799748 is a wasteful number, since it uses less digits than its factorization.

31799748 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2649986 (or 2649984 counting only the distinct ones).

The product of its digits is 381024, while the sum is 48.

The square root of 31799748 is about 5639.1265281070. The cubic root of 31799748 is about 316.8165736534.

The spelling of 31799748 in words is "thirty-one million, seven hundred ninety-nine thousand, seven hundred forty-eight".