39994990 has 32 divisors (see below), whose sum is σ = 83104704. Its totient is φ = 13574400.

The previous prime is 39994963. The next prime is 39995017. The reversal of 39994990 is 9949993.

It is an interprime number because it is at equal distance from previous prime (39994963) and next prime (39995017).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4242 + ... + 9898.

It is an arithmetic number, because the mean of its divisors is an integer number (2597022).

Almost surely, 2^39994990 is an apocalyptic number.

39994990 is an abundant number, since it is smaller than the sum of its proper divisors (43109714).

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

39994990 is a wasteful number, since it uses less digits than its factorization.

39994990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5772.

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

The square root of 39994990 is about 6324.1592326569. The cubic root of 39994990 is about 341.9809104400.

The spelling of 39994990 in words is "thirty-nine million, nine hundred ninety-four thousand, nine hundred ninety".