400745879 has 16 divisors (see below), whose sum is σ = 434367360. Its totient is φ = 368309760.

The previous prime is 400745869. The next prime is 400745887. The reversal of 400745879 is 978547004.

It is not a de Polignac number, because 400745879 - 2⁸ = 400745623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400745869) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 214409 + ... + 216269.

It is an arithmetic number, because the mean of its divisors is an integer number (27147960).

Almost surely, 2^400745879 is an apocalyptic number.

400745879 is a deficient number, since it is larger than the sum of its proper divisors (33621481).

400745879 is a wasteful number, since it uses less digits than its factorization.

400745879 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2170.

The product of its (nonzero) digits is 282240, while the sum is 44.

The square root of 400745879 is about 20018.6382903533. The cubic root of 400745879 is about 737.2639889835.

The spelling of 400745879 in words is "four hundred million, seven hundred forty-five thousand, eight hundred seventy-nine".