38991942 has 40 divisors (see below), whose sum is σ = 95317992. Its totient is φ = 11815200.

The previous prime is 38991937. The next prime is 38991949. The reversal of 38991942 is 24919983.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38991949) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 9159 + ... + 12722.

Almost surely, 2^38991942 is an apocalyptic number.

38991942 is an abundant number, since it is smaller than the sum of its proper divisors (56326050).

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

38991942 is a wasteful number, since it uses less digits than its factorization.

38991942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21906 (or 21897 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 38991942 is about 6244.3528087385. The cubic root of 38991942 is about 339.0977868108.

The spelling of 38991942 in words is "thirty-eight million, nine hundred ninety-one thousand, nine hundred forty-two".