400552765 has 4 divisors (see below), whose sum is σ = 480663324. Its totient is φ = 320442208.

The previous prime is 400552729. The next prime is 400552781. The reversal of 400552765 is 567255004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 113656921 + 286895844 = 10661^2 + 16938^2 .

It is a cyclic number.

It is not a de Polignac number, because 400552765 - 2⁷ = 400552637 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400552765.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 40055272 + ... + 40055281.

It is an arithmetic number, because the mean of its divisors is an integer number (120165831).

Almost surely, 2^400552765 is an apocalyptic number.

It is an amenable number.

400552765 is a deficient number, since it is larger than the sum of its proper divisors (80110559).

400552765 is an equidigital number, since it uses as much as digits as its factorization.

400552765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80110558.

The product of its (nonzero) digits is 42000, while the sum is 34.

The square root of 400552765 is about 20013.8143540905. The cubic root of 400552765 is about 737.1455441192.

The spelling of 400552765 in words is "four hundred million, five hundred fifty-two thousand, seven hundred sixty-five".