39392990 has 64 divisors (see below), whose sum is σ = 88615296. Its totient is φ = 12275712.

The previous prime is 39392989. The next prime is 39392999. The reversal of 39392990 is 9929393.

It is a super-2 number, since 2×39392990² = 3103615322280200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39392999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 66134 + ... + 66726.

It is an arithmetic number, because the mean of its divisors is an integer number (1384614).

Almost surely, 2^39392990 is an apocalyptic number.

39392990 is an abundant number, since it is smaller than the sum of its proper divisors (49222306).

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

39392990 is a wasteful number, since it uses less digits than its factorization.

39392990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693.

The product of its (nonzero) digits is 118098, while the sum is 44.

The square root of 39392990 is about 6276.3835128201. The cubic root of 39392990 is about 340.2564098104.

The spelling of 39392990 in words is "thirty-nine million, three hundred ninety-two thousand, nine hundred ninety".