400124055 has 8 divisors (see below), whose sum is σ = 640198512. Its totient is φ = 213399488.

The previous prime is 400124033. The next prime is 400124069. The reversal of 400124055 is 550421004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400124055 - 2²¹ = 398026903 is a prime.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 13337454 + ... + 13337483.

It is an arithmetic number, because the mean of its divisors is an integer number (80024814).

Almost surely, 2^400124055 is an apocalyptic number.

400124055 is a deficient number, since it is larger than the sum of its proper divisors (240074457).

400124055 is a wasteful number, since it uses less digits than its factorization.

400124055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26674945.

The product of its (nonzero) digits is 800, while the sum is 21.

The square root of 400124055 is about 20003.1011345741. The cubic root of 400124055 is about 736.8824622763.

Adding to 400124055 its reverse (550421004), we get a palindrome (950545059).

The spelling of 400124055 in words is "four hundred million, one hundred twenty-four thousand, fifty-five".