31196140 has 12 divisors (see below), whose sum is σ = 65511936. Its totient is φ = 12478448.

The previous prime is 31196129. The next prime is 31196159. The reversal of 31196140 is 4169113.

It is an unprimeable number.

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, 779884 + ... + 779923.

It is an arithmetic number, because the mean of its divisors is an integer number (5459328).

Almost surely, 2^31196140 is an apocalyptic number.

It is an amenable number.

31196140 is an abundant number, since it is smaller than the sum of its proper divisors (34315796).

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

31196140 is a wasteful number, since it uses less digits than its factorization.

31196140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1559816 (or 1559814 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 31196140 is about 5585.3504813933. The cubic root of 31196140 is about 314.7992001517.

The spelling of 31196140 in words is "thirty-one million, one hundred ninety-six thousand, one hundred forty".