31424772 has 24 divisors (see below), whose sum is σ = 77638176. Its totient is φ = 9858688.

The previous prime is 31424759. The next prime is 31424779. The reversal of 31424772 is 27742413.

It is a hoax number, since the sum of its digits (30) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (31424779) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76818 + ... + 77225.

It is an arithmetic number, because the mean of its divisors is an integer number (3234924).

Almost surely, 2^31424772 is an apocalyptic number.

It is an amenable number.

31424772 is an abundant number, since it is smaller than the sum of its proper divisors (46213404).

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

31424772 is a wasteful number, since it uses less digits than its factorization.

31424772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154067 (or 154065 counting only the distinct ones).

The product of its digits is 9408, while the sum is 30.

The square root of 31424772 is about 5605.7802311543. The cubic root of 31424772 is about 315.5663683137.

The spelling of 31424772 in words is "thirty-one million, four hundred twenty-four thousand, seven hundred seventy-two".