400364387 has 4 divisors (see below), whose sum is σ = 400410000. Its totient is φ = 400318776.

The previous prime is 400364353. The next prime is 400364389. The reversal of 400364387 is 783463004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 400364387 - 2¹⁸ = 400102243 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400364389) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5012 + ... + 28737.

It is an arithmetic number, because the mean of its divisors is an integer number (100102500).

Almost surely, 2^400364387 is an apocalyptic number.

400364387 is a deficient number, since it is larger than the sum of its proper divisors (45613).

400364387 is a wasteful number, since it uses less digits than its factorization.

400364387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45612.

The product of its (nonzero) digits is 48384, while the sum is 35.

The square root of 400364387 is about 20009.1076012900. The cubic root of 400364387 is about 737.0299673548.

The spelling of 400364387 in words is "four hundred million, three hundred sixty-four thousand, three hundred eighty-seven".