31680898 has 4 divisors (see below), whose sum is σ = 47521350. Its totient is φ = 15840448.

The previous prime is 31680893. The next prime is 31680919. The reversal of 31680898 is 89808613.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15896169 + 15784729 = 3987^2 + 3973^2 .

It is not an unprimeable number, because it can be changed into a prime (31680893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7920223 + ... + 7920226.

Almost surely, 2^31680898 is an apocalyptic number.

31680898 is a deficient number, since it is larger than the sum of its proper divisors (15840452).

31680898 is a wasteful number, since it uses less digits than its factorization.

31680898 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15840451.

The product of its (nonzero) digits is 82944, while the sum is 43.

The square root of 31680898 is about 5628.5786838242. The cubic root of 31680898 is about 316.4213854380.

It can be divided in two parts, 316808 and 98, that multiplied together give a square (31047184 = 5572²).

The spelling of 31680898 in words is "thirty-one million, six hundred eighty thousand, eight hundred ninety-eight".