400149954 has 24 divisors (see below), whose sum is σ = 867360000. Its totient is φ = 133326648.

The previous prime is 400149943. The next prime is 400149979. The reversal of 400149954 is 459941004.

It is a happy 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 11 ways as a sum of consecutive naturals, for example, 77547 + ... + 82545.

It is an arithmetic number, because the mean of its divisors is an integer number (36140000).

Almost surely, 2^400149954 is an apocalyptic number.

400149954 is an abundant number, since it is smaller than the sum of its proper divisors (467210046).

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

400149954 is a wasteful number, since it uses less digits than its factorization.

400149954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9454 (or 9451 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 36.

The square root of 400149954 is about 20003.7484987189. The cubic root of 400149954 is about 736.8983607682.

The spelling of 400149954 in words is "four hundred million, one hundred forty-nine thousand, nine hundred fifty-four".