31494940 has 12 divisors (see below), whose sum is σ = 66139416. Its totient is φ = 12597968.

The previous prime is 31494937. The next prime is 31494943. The reversal of 31494940 is 4949413.

It is an interprime number because it is at equal distance from previous prime (31494937) and next prime (31494943).

It is a junction number, because it is equal to n+sod(n) for n = 31494896 and 31494905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31494943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 787354 + ... + 787393.

It is an arithmetic number, because the mean of its divisors is an integer number (5511618).

Almost surely, 2^31494940 is an apocalyptic number.

It is an amenable number.

31494940 is an abundant number, since it is smaller than the sum of its proper divisors (34644476).

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

31494940 is a wasteful number, since it uses less digits than its factorization.

31494940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1574756 (or 1574754 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 34.

The square root of 31494940 is about 5612.0352814287. The cubic root of 31494940 is about 315.8010685119.

The spelling of 31494940 in words is "thirty-one million, four hundred ninety-four thousand, nine hundred forty".