31427392 has 28 divisors (see below), whose sum is σ = 62731396. Its totient is φ = 15621120.

The previous prime is 31427381. The next prime is 31427399. The reversal of 31427392 is 29372413.

It can be written as a sum of positive squares in 2 ways, for example, as 15555136 + 15872256 = 3944^2 + 3984^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31427399) 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, 10228 + ... + 12940.

It is an arithmetic number, because the mean of its divisors is an integer number (2240407).

Almost surely, 2^31427392 is an apocalyptic number.

31427392 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

31427392 is a deficient number, since it is larger than the sum of its proper divisors (31304004).

31427392 is a wasteful number, since it uses less digits than its factorization.

31427392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2906 (or 2896 counting only the distinct ones).

The product of its digits is 9072, while the sum is 31.

The square root of 31427392 is about 5606.0139136467. The cubic root of 31427392 is about 315.5751380502.

The spelling of 31427392 in words is "thirty-one million, four hundred twenty-seven thousand, three hundred ninety-two".