400550090 has 32 divisors (see below), whose sum is σ = 767724480. Its totient is φ = 149941504.

The previous prime is 400550089. The next prime is 400550099. The reversal of 400550090 is 90055004.

It is not an unprimeable number, because it can be changed into a prime (400550099) 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 15 ways as a sum of consecutive naturals, for example, 23849 + ... + 37011.

It is an arithmetic number, because the mean of its divisors is an integer number (23991390).

Almost surely, 2^400550090 is an apocalyptic number.

400550090 is a deficient number, since it is larger than the sum of its proper divisors (367174390).

400550090 is a wasteful number, since it uses less digits than its factorization.

400550090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13366.

The product of its (nonzero) digits is 900, while the sum is 23.

The square root of 400550090 is about 20013.7475251388. The cubic root of 400550090 is about 737.1439031630.

The spelling of 400550090 in words is "four hundred million, five hundred fifty thousand, ninety".