405795978 has 24 divisors (see below), whose sum is σ = 1004828448. Its totient is φ = 115941672.

The previous prime is 405795961. The next prime is 405795989. The reversal of 405795978 is 879597504.

405795978 is a `hidden beast` number, since 40 + 5 + 7 + 9 + 597 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1610176 + ... + 1610427.

It is an arithmetic number, because the mean of its divisors is an integer number (41867852).

Almost surely, 2^405795978 is an apocalyptic number.

405795978 is an abundant number, since it is smaller than the sum of its proper divisors (599032470).

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

405795978 is a wasteful number, since it uses less digits than its factorization.

405795978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3220618 (or 3220615 counting only the distinct ones).

The product of its (nonzero) digits is 3175200, while the sum is 54.

The square root of 405795978 is about 20144.3783224998. The cubic root of 405795978 is about 740.3480089440.

The spelling of 405795978 in words is "four hundred five million, seven hundred ninety-five thousand, nine hundred seventy-eight".