39990850 has 12 divisors (see below), whose sum is σ = 74383074. Its totient is φ = 15996320.

The previous prime is 39990833. The next prime is 39990857. The reversal of 39990850 is 5809993.

It can be written as a sum of positive squares in 3 ways, for example, as 32867289 + 7123561 = 5733^2 + 2669^2 .

It is a junction number, because it is equal to n+sod(n) for n = 39990797 and 39990806.

It is not an unprimeable number, because it can be changed into a prime (39990857) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 399859 + ... + 399958.

Almost surely, 2^39990850 is an apocalyptic number.

39990850 is a deficient number, since it is larger than the sum of its proper divisors (34392224).

39990850 is a wasteful number, since it uses less digits than its factorization.

39990850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 799829 (or 799824 counting only the distinct ones).

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 39990850 is about 6323.8319079495. The cubic root of 39990850 is about 341.9691102135.

The spelling of 39990850 in words is "thirty-nine million, nine hundred ninety thousand, eight hundred fifty".