408278942 has 16 divisors (see below), whose sum is σ = 642358080. Its totient is φ = 194394528.

The previous prime is 408278929. The next prime is 408278951. The reversal of 408278942 is 249872804.

It is a junction number, because it is equal to n+sod(n) for n = 408278893 and 408278902.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 55217 + ... + 62172.

It is an arithmetic number, because the mean of its divisors is an integer number (40147380).

Almost surely, 2^408278942 is an apocalyptic number.

408278942 is a deficient number, since it is larger than the sum of its proper divisors (234079138).

408278942 is a wasteful number, since it uses less digits than its factorization.

408278942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117475.

The product of its (nonzero) digits is 258048, while the sum is 44.

The square root of 408278942 is about 20205.9135403475. The cubic root of 408278942 is about 741.8549409716.

The spelling of 408278942 in words is "four hundred eight million, two hundred seventy-eight thousand, nine hundred forty-two".