31293392 has 60 divisors (see below), whose sum is σ = 66986784. Its totient is φ = 14152320.

The previous prime is 31293389. The next prime is 31293439. The reversal of 31293392 is 29339213.

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 11 ways as a sum of consecutive naturals, for example, 191903 + ... + 192065.

Almost surely, 2^31293392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31293392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33493392).

31293392 is an abundant number, since it is smaller than the sum of its proper divisors (35693392).

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

31293392 is a wasteful number, since it uses less digits than its factorization.

31293392 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268 (or 249 counting only the distinct ones).

The product of its digits is 8748, while the sum is 32.

The square root of 31293392 is about 5594.0496958822. The cubic root of 31293392 is about 315.1259830326.

The spelling of 31293392 in words is "thirty-one million, two hundred ninety-three thousand, three hundred ninety-two".