31942000 has 40 divisors (see below), whose sum is σ = 77240592. Its totient is φ = 12776000.

The previous prime is 31941971. The next prime is 31942007. The reversal of 31942000 is 24913.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31942007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5986 + ... + 9985.

Almost surely, 2^31942000 is an apocalyptic number.

It is an amenable number.

31942000 is an abundant number, since it is smaller than the sum of its proper divisors (45298592).

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

31942000 is a wasteful number, since it uses less digits than its factorization.

31942000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15994 (or 15978 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 31942000 is about 5651.7254002649. The cubic root of 31942000 is about 317.2882834306.

Adding to 31942000 its reverse (24913), we get a palindrome (31966913).

The spelling of 31942000 in words is "thirty-one million, nine hundred forty-two thousand".