400579801 has 4 divisors (see below), whose sum is σ = 406558672. Its totient is φ = 394600932.

The previous prime is 400579769. The next prime is 400579877. The reversal of 400579801 is 108975004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400579801 - 2⁵ = 400579769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400576801) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2989335 + ... + 2989468.

It is an arithmetic number, because the mean of its divisors is an integer number (101639668).

Almost surely, 2^400579801 is an apocalyptic number.

It is an amenable number.

400579801 is a deficient number, since it is larger than the sum of its proper divisors (5978871).

400579801 is an equidigital number, since it uses as much as digits as its factorization.

400579801 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5978870.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 400579801 is about 20014.4897761597. The cubic root of 400579801 is about 737.1621287162.

The spelling of 400579801 in words is "four hundred million, five hundred seventy-nine thousand, eight hundred one".