38945990 has 16 divisors (see below), whose sum is σ = 71426448. Its totient is φ = 15284256.

The previous prime is 38945989. The next prime is 38946001. The reversal of 38945990 is 9954983.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36212 + ... + 37271.

It is an arithmetic number, because the mean of its divisors is an integer number (4464153).

Almost surely, 2^38945990 is an apocalyptic number.

38945990 is a deficient number, since it is larger than the sum of its proper divisors (32480458).

38945990 is a wasteful number, since it uses less digits than its factorization.

38945990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73543.

The product of its (nonzero) digits is 349920, while the sum is 47.

The square root of 38945990 is about 6240.6722394306. The cubic root of 38945990 is about 338.9645255443.

The spelling of 38945990 in words is "thirty-eight million, nine hundred forty-five thousand, nine hundred ninety".