31775793940 has 48 divisors (see below), whose sum is σ = 72964571904. Its totient is φ = 11527990400.

The previous prime is 31775793937. The next prime is 31775793943. The reversal of 31775793940 is 4939757713.

It is an interprime number because it is at equal distance from previous prime (31775793937) and next prime (31775793943).

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31775793943) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72739 + ... + 262378.

It is an arithmetic number, because the mean of its divisors is an integer number (1520095248).

Almost surely, 2^31775793940 is an apocalyptic number.

It is an amenable number.

31775793940 is an abundant number, since it is smaller than the sum of its proper divisors (41188777964).

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

31775793940 is a wasteful number, since it uses less digits than its factorization.

31775793940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 335568 (or 335566 counting only the distinct ones).

The product of its (nonzero) digits is 5000940, while the sum is 55.

The spelling of 31775793940 in words is "thirty-one billion, seven hundred seventy-five million, seven hundred ninety-three thousand, nine hundred forty".