38991982 has 8 divisors (see below), whose sum is σ = 61928496. Its totient is φ = 18349152.

The previous prime is 38991973. The next prime is 38991991. The reversal of 38991982 is 28919983.

It is an interprime number because it is at equal distance from previous prime (38991973) and next prime (38991991).

It is a sphenic number, since it is the product of 3 distinct primes.

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, 573378 + ... + 573445.

It is an arithmetic number, because the mean of its divisors is an integer number (7741062).

Almost surely, 2^38991982 is an apocalyptic number.

38991982 is a deficient number, since it is larger than the sum of its proper divisors (22936514).

38991982 is a wasteful number, since it uses less digits than its factorization.

38991982 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1146842.

The product of its digits is 279936, while the sum is 49.

The square root of 38991982 is about 6244.3560116316. The cubic root of 38991982 is about 339.0979027656.

The spelling of 38991982 in words is "thirty-eight million, nine hundred ninety-one thousand, nine hundred eighty-two".