42031988 has 12 divisors (see below), whose sum is σ = 73776612. Its totient is φ = 20952960.

The previous prime is 42031967. The next prime is 42031999. The reversal of 42031988 is 88913024.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4919524 + 37112464 = 2218^2 + 6092^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14243 + ... + 16938.

It is an arithmetic number, because the mean of its divisors is an integer number (6148051).

Almost surely, 2^42031988 is an apocalyptic number.

It is an amenable number.

42031988 is a deficient number, since it is larger than the sum of its proper divisors (31744624).

42031988 is a wasteful number, since it uses less digits than its factorization.

42031988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31522 (or 31520 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 42031988 is about 6483.2081564608. The cubic root of 42031988 is about 347.6908890314.

The spelling of 42031988 in words is "forty-two million, thirty-one thousand, nine hundred eighty-eight".