400468389 has 4 divisors (see below), whose sum is σ = 533957856. Its totient is φ = 266978924.

The previous prime is 400468373. The next prime is 400468403. The reversal of 400468389 is 983864004.

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 400468389 - 2⁴ = 400468373 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400468389.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400468349) 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, 66744729 + ... + 66744734.

It is an arithmetic number, because the mean of its divisors is an integer number (133489464).

Almost surely, 2^400468389 is an apocalyptic number.

It is an amenable number.

400468389 is a deficient number, since it is larger than the sum of its proper divisors (133489467).

400468389 is a wasteful number, since it uses less digits than its factorization.

400468389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133489466.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 400468389 is about 20011.7062990641. The cubic root of 400468389 is about 737.0937808514.

The spelling of 400468389 in words is "four hundred million, four hundred sixty-eight thousand, three hundred eighty-nine".