39901994 has 16 divisors (see below), whose sum is σ = 65931840. Its totient is φ = 17960160.

The previous prime is 39901963. The next prime is 39901997. The reversal of 39901994 is 49910993.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (39901997) 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, 6539 + ... + 11070.

It is an arithmetic number, because the mean of its divisors is an integer number (4120740).

Almost surely, 2^39901994 is an apocalyptic number.

39901994 is a deficient number, since it is larger than the sum of its proper divisors (26029846).

39901994 is a wasteful number, since it uses less digits than its factorization.

39901994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17725.

The product of its (nonzero) digits is 78732, while the sum is 44.

The square root of 39901994 is about 6316.8025139306. The cubic root of 39901994 is about 341.7156477335.

The spelling of 39901994 in words is "thirty-nine million, nine hundred one thousand, nine hundred ninety-four".