39958990 has 16 divisors (see below), whose sum is σ = 72838080. Its totient is φ = 15780960.

The previous prime is 39958931. The next prime is 39958991. The reversal of 39958990 is 9985993.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39958991) 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, 24501 + ... + 26080.

It is an arithmetic number, because the mean of its divisors is an integer number (4552380).

Almost surely, 2^39958990 is an apocalyptic number.

39958990 is a deficient number, since it is larger than the sum of its proper divisors (32879090).

39958990 is a wasteful number, since it uses less digits than its factorization.

39958990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50667.

The product of its (nonzero) digits is 787320, while the sum is 52.

The square root of 39958990 is about 6321.3123637422. The cubic root of 39958990 is about 341.8782725140.

The spelling of 39958990 in words is "thirty-nine million, nine hundred fifty-eight thousand, nine hundred ninety".