400718023 has 4 divisors (see below), whose sum is σ = 400929408. Its totient is φ = 400506640.

The previous prime is 400718009. The next prime is 400718057. The reversal of 400718023 is 320817004.

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

It is a cyclic number.

It is not a de Polignac number, because 400718023 - 2¹³ = 400709831 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400712023) 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, 102823 + ... + 106648.

It is an arithmetic number, because the mean of its divisors is an integer number (100232352).

Almost surely, 2^400718023 is an apocalyptic number.

400718023 is a deficient number, since it is larger than the sum of its proper divisors (211385).

400718023 is a wasteful number, since it uses less digits than its factorization.

400718023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 211384.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 400718023 is about 20017.9425266434. The cubic root of 400718023 is about 737.2469060867.

The spelling of 400718023 in words is "four hundred million, seven hundred eighteen thousand, twenty-three".