31427964 has 18 divisors (see below), whose sum is σ = 79443000. Its totient is φ = 10475976.

The previous prime is 31427941. The next prime is 31427983. The reversal of 31427964 is 46972413.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 872999 = 31427964 / (3 + 1 + 4 + 2 + 7 + 9 + 6 + 4).

It is a congruent number.

It is an unprimeable number.

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, 436464 + ... + 436535.

It is an arithmetic number, because the mean of its divisors is an integer number (4413500).

Almost surely, 2^31427964 is an apocalyptic number.

It is an amenable number.

31427964 is an abundant number, since it is smaller than the sum of its proper divisors (48015036).

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

31427964 is a wasteful number, since it uses less digits than its factorization.

31427964 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 873009 (or 873004 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 31427964 is about 5606.0649300557. The cubic root of 31427964 is about 315.5770525996.

The spelling of 31427964 in words is "thirty-one million, four hundred twenty-seven thousand, nine hundred sixty-four".