406239438 has 32 divisors (see below), whose sum is σ = 914936832. Its totient is φ = 119131200.

The previous prime is 406239419. The next prime is 406239467. The reversal of 406239438 is 834932604.

It is a junction number, because it is equal to n+sod(n) for n = 406239396 and 406239405.

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, 97231 + ... + 101322.

It is an arithmetic number, because the mean of its divisors is an integer number (28591776).

Almost surely, 2^406239438 is an apocalyptic number.

406239438 is an abundant number, since it is smaller than the sum of its proper divisors (508697394).

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

406239438 is a wasteful number, since it uses less digits than its factorization.

406239438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198600.

The product of its (nonzero) digits is 124416, while the sum is 39.

The square root of 406239438 is about 20155.3823580700. The cubic root of 406239438 is about 740.6175986086.

The spelling of 406239438 in words is "four hundred six million, two hundred thirty-nine thousand, four hundred thirty-eight".