400814889 has 4 divisors (see below), whose sum is σ = 534419856. Its totient is φ = 267209924.

The previous prime is 400814879. The next prime is 400814891. The reversal of 400814889 is 988418004.

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 400814889 - 2¹³ = 400806697 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400814889.

It is not an unprimeable number, because it can be changed into a prime (400814839) 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, 66802479 + ... + 66802484.

It is an arithmetic number, because the mean of its divisors is an integer number (133604964).

Almost surely, 2^400814889 is an apocalyptic number.

It is an amenable number.

400814889 is a deficient number, since it is larger than the sum of its proper divisors (133604967).

400814889 is a wasteful number, since it uses less digits than its factorization.

400814889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133604966.

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 400814889 is about 20020.3618598666. The cubic root of 400814889 is about 737.3063064640.

The spelling of 400814889 in words is "four hundred million, eight hundred fourteen thousand, eight hundred eighty-nine".