39920406 has 16 divisors (see below), whose sum is σ = 84043200. Its totient is φ = 12606408.

The previous prime is 39920393. The next prime is 39920411. The reversal of 39920406 is 60402993.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 174976 + ... + 175203.

It is an arithmetic number, because the mean of its divisors is an integer number (5252700).

Almost surely, 2^39920406 is an apocalyptic number.

39920406 is an abundant number, since it is smaller than the sum of its proper divisors (44122794).

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

39920406 is a wasteful number, since it uses less digits than its factorization.

39920406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 350203.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 39920406 is about 6318.2597287544. The cubic root of 39920406 is about 341.7681990006.

The spelling of 39920406 in words is "thirty-nine million, nine hundred twenty thousand, four hundred six".