400255550 has 24 divisors (see below), whose sum is σ = 745043832. Its totient is φ = 159980000.

The previous prime is 400255543. The next prime is 400255553. The reversal of 400255550 is 55552004.

It is a hoax number, since the sum of its digits (26) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400255553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 92945 + ... + 97155.

It is an arithmetic number, because the mean of its divisors is an integer number (31043493).

Almost surely, 2^400255550 is an apocalyptic number.

400255550 is a deficient number, since it is larger than the sum of its proper divisors (344788282).

400255550 is a wasteful number, since it uses less digits than its factorization.

400255550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6124 (or 6119 counting only the distinct ones).

The product of its (nonzero) digits is 5000, while the sum is 26.

The square root of 400255550 is about 20006.3877299227. The cubic root of 400255550 is about 736.9631753664.

The spelling of 400255550 in words is "four hundred million, two hundred fifty-five thousand, five hundred fifty".