404778534 has 16 divisors (see below), whose sum is σ = 857178288. Its totient is φ = 126989312.

The previous prime is 404778511. The next prime is 404778571. The reversal of 404778534 is 435877404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1984107 + ... + 1984310.

It is an arithmetic number, because the mean of its divisors is an integer number (53573643).

Almost surely, 2^404778534 is an apocalyptic number.

404778534 is an abundant number, since it is smaller than the sum of its proper divisors (452399754).

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

404778534 is a wasteful number, since it uses less digits than its factorization.

404778534 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3968439.

The product of its (nonzero) digits is 376320, while the sum is 42.

The square root of 404778534 is about 20119.1086780702. The cubic root of 404778534 is about 739.7287379264.

The spelling of 404778534 in words is "four hundred four million, seven hundred seventy-eight thousand, five hundred thirty-four".