39200421 has 16 divisors (see below), whose sum is σ = 56510720. Its totient is φ = 24027840.

The previous prime is 39200417. The next prime is 39200429. The reversal of 39200421 is 12400293.

It is not a de Polignac number, because 39200421 - 2² = 39200417 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39200429) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8715 + ... + 12423.

It is an arithmetic number, because the mean of its divisors is an integer number (3531920).

Almost surely, 2^39200421 is an apocalyptic number.

It is an amenable number.

39200421 is a deficient number, since it is larger than the sum of its proper divisors (17310299).

39200421 is a wasteful number, since it uses less digits than its factorization.

39200421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3996.

The product of its (nonzero) digits is 432, while the sum is 21.

The square root of 39200421 is about 6261.0239577884. The cubic root of 39200421 is about 339.7010665464.

It can be divided in two parts, 39200 and 421, that added together give a triangular number (39621 = T₂₈₁).

The spelling of 39200421 in words is "thirty-nine million, two hundred thousand, four hundred twenty-one".