400023055 has 16 divisors (see below), whose sum is σ = 513583200. Its totient is φ = 298200960.

The previous prime is 400022993. The next prime is 400023079. The reversal of 400023055 is 550320004.

It is a happy number.

It is not a de Polignac number, because 400023055 - 2¹¹ = 400021007 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28720 + ... + 40309.

It is an arithmetic number, because the mean of its divisors is an integer number (32098950).

Almost surely, 2^400023055 is an apocalyptic number.

400023055 is a deficient number, since it is larger than the sum of its proper divisors (113560145).

400023055 is a wasteful number, since it uses less digits than its factorization.

400023055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69114.

The product of its (nonzero) digits is 600, while the sum is 19.

The square root of 400023055 is about 20000.5763666950. The cubic root of 400023055 is about 736.8204553471.

Adding to 400023055 its reverse (550320004), we get a palindrome (950343059).

The spelling of 400023055 in words is "four hundred million, twenty-three thousand, fifty-five".