31374144 has 42 divisors (see below), whose sum is σ = 89929970. Its totient is φ = 10457856.

The previous prime is 31374137. The next prime is 31374151. The reversal of 31374144 is 44147313.

It is an interprime number because it is at equal distance from previous prime (31374137) and next prime (31374151).

It can be written as a sum of positive squares in only one way, i.e., 29160000 + 2214144 = 5400^2 + 1488^2 .

It is a super-3 number, since 3×31374144³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 26659 + ... + 27810.

Almost surely, 2^31374144 is an apocalyptic number.

It is an amenable number.

31374144 is an abundant number, since it is smaller than the sum of its proper divisors (58555826).

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

31374144 is a wasteful number, since it uses less digits than its factorization.

31374144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54487 (or 54474 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 31374144 is about 5601.2627147814. The cubic root of 31374144 is about 315.3968090711.

The spelling of 31374144 in words is "thirty-one million, three hundred seventy-four thousand, one hundred forty-four".