39990074 has 4 divisors (see below), whose sum is σ = 59985114. Its totient is φ = 19995036.

The previous prime is 39990019. The next prime is 39990107. The reversal of 39990074 is 47009993.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 47009993 = 53 ⋅886981.

It can be written as a sum of positive squares in only one way, i.e., 37761025 + 2229049 = 6145^2 + 1493^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9997517 + ... + 9997520.

Almost surely, 2^39990074 is an apocalyptic number.

39990074 is a deficient number, since it is larger than the sum of its proper divisors (19995040).

39990074 is a wasteful number, since it uses less digits than its factorization.

39990074 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19995039.

The product of its (nonzero) digits is 61236, while the sum is 41.

The square root of 39990074 is about 6323.7705524473. The cubic root of 39990074 is about 341.9668982930.

The spelling of 39990074 in words is "thirty-nine million, nine hundred ninety thousand, seventy-four".