31423698 has 12 divisors (see below), whose sum is σ = 68084718. Its totient is φ = 10474560.

The previous prime is 31423697. The next prime is 31423703. The reversal of 31423698 is 89632413.

It can be written as a sum of positive squares in only one way, i.e., 26347689 + 5076009 = 5133^2 + 2253^2 .

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (31423697) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 872863 + ... + 872898.

Almost surely, 2^31423698 is an apocalyptic number.

31423698 is an abundant number, since it is smaller than the sum of its proper divisors (36661020).

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

31423698 is a wasteful number, since it uses less digits than its factorization.

31423698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1745769 (or 1745766 counting only the distinct ones).

The product of its digits is 31104, while the sum is 36.

The square root of 31423698 is about 5605.6844363557. The cubic root of 31423698 is about 315.5627732503.

The spelling of 31423698 in words is "thirty-one million, four hundred twenty-three thousand, six hundred ninety-eight".