31342940 has 12 divisors (see below), whose sum is σ = 65820216. Its totient is φ = 12537168.

The previous prime is 31342933. The next prime is 31342943. The reversal of 31342940 is 4924313.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31342943) by changing a digit.

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, 783554 + ... + 783593.

It is an arithmetic number, because the mean of its divisors is an integer number (5485018).

Almost surely, 2^31342940 is an apocalyptic number.

It is an amenable number.

31342940 is an abundant number, since it is smaller than the sum of its proper divisors (34477276).

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

31342940 is a wasteful number, since it uses less digits than its factorization.

31342940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1567156 (or 1567154 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 26.

The square root of 31342940 is about 5598.4765784988. The cubic root of 31342940 is about 315.2922122563.

The spelling of 31342940 in words is "thirty-one million, three hundred forty-two thousand, nine hundred forty".