400544055 has 128 divisors (see below), whose sum is σ = 797817600. Its totient is φ = 189775872.

The previous prime is 400544033. The next prime is 400544077. The reversal of 400544055 is 550445004.

It is an interprime number because it is at equal distance from previous prime (400544033) and next prime (400544077).

It is not a de Polignac number, because 400544055 - 2⁶ = 400543991 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 4500451 + ... + 4500539.

It is an arithmetic number, because the mean of its divisors is an integer number (6232950).

Almost surely, 2^400544055 is an apocalyptic number.

400544055 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

400544055 is a deficient number, since it is larger than the sum of its proper divisors (397273545).

400544055 is a wasteful number, since it uses less digits than its factorization.

400544055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 210 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 8000, while the sum is 27.

The square root of 400544055 is about 20013.5967532076. The cubic root of 400544055 is about 737.1402010161.

Adding to 400544055 its reverse (550445004), we get a palindrome (950989059).

The spelling of 400544055 in words is "four hundred million, five hundred forty-four thousand, fifty-five".