31419940 has 24 divisors (see below), whose sum is σ = 67592952. Its totient is φ = 12261120.

The previous prime is 31419907. The next prime is 31419967. The reversal of 31419940 is 4991413.

It can be written as a sum of positive squares in 4 ways, for example, as 417316 + 31002624 = 646^2 + 5568^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18339 + ... + 19978.

It is an arithmetic number, because the mean of its divisors is an integer number (2816373).

Almost surely, 2^31419940 is an apocalyptic number.

It is an amenable number.

31419940 is an abundant number, since it is smaller than the sum of its proper divisors (36173012).

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

31419940 is a wasteful number, since it uses less digits than its factorization.

31419940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38367 (or 38365 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 31.

The square root of 31419940 is about 5605.3492308687. The cubic root of 31419940 is about 315.5501932310.

The spelling of 31419940 in words is "thirty-one million, four hundred nineteen thousand, nine hundred forty".