31868433400 has 24 divisors (see below), whose sum is σ = 74094108120. Its totient is φ = 12747373280.

The previous prime is 31868433391. The next prime is 31868433409. The reversal of 31868433400 is 433486813.

It is an interprime number because it is at equal distance from previous prime (31868433391) and next prime (31868433409).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31868433409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 79670884 + ... + 79671283.

It is an arithmetic number, because the mean of its divisors is an integer number (3087254505).

Almost surely, 2^31868433400 is an apocalyptic number.

It is an amenable number.

31868433400 is an abundant number, since it is smaller than the sum of its proper divisors (42225674720).

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

31868433400 is a wasteful number, since it uses less digits than its factorization.

31868433400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159342183 (or 159342174 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 40.

The spelling of 31868433400 in words is "thirty-one billion, eight hundred sixty-eight million, four hundred thirty-three thousand, four hundred".