400255554 has 16 divisors (see below), whose sum is σ = 810645120. Its totient is φ = 131729520.

The previous prime is 400255553. The next prime is 400255579. The reversal of 400255554 is 455552004.

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

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 421737 + ... + 422684.

It is an arithmetic number, because the mean of its divisors is an integer number (50665320).

Almost surely, 2^400255554 is an apocalyptic number.

400255554 is an abundant number, since it is smaller than the sum of its proper divisors (410389566).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400255554 is a wasteful number, since it uses less digits than its factorization.

400255554 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844505.

The product of its (nonzero) digits is 20000, while the sum is 30.

The square root of 400255554 is about 20006.3878298907. The cubic root of 400255554 is about 736.9631778214.

The spelling of 400255554 in words is "four hundred million, two hundred fifty-five thousand, five hundred fifty-four".