39499990 has 16 divisors (see below), whose sum is σ = 71422848. Its totient is φ = 15728256.

The previous prime is 39499973. The next prime is 39499991. The reversal of 39499990 is 9999493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39499991) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6627 + ... + 11086.

It is an arithmetic number, because the mean of its divisors is an integer number (4463928).

Almost surely, 2^39499990 is an apocalyptic number.

39499990 is a deficient number, since it is larger than the sum of its proper divisors (31922858).

39499990 is a wasteful number, since it uses less digits than its factorization.

39499990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17943.

The product of its (nonzero) digits is 708588, while the sum is 52.

The square root of 39499990 is about 6284.9017494309. The cubic root of 39499990 is about 340.5642016449.

The spelling of 39499990 in words is "thirty-nine million, four hundred ninety-nine thousand, nine hundred ninety".