400648896 has 112 divisors (see below), whose sum is σ = 1239926400. Its totient is φ = 126510336.

The previous prime is 400648883. The next prime is 400648903. The reversal of 400648896 is 698846004.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26731 + ... + 38933.

Almost surely, 2^400648896 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400648896, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (619963200).

400648896 is an abundant number, since it is smaller than the sum of its proper divisors (839277504).

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

400648896 is a wasteful number, since it uses less digits than its factorization.

400648896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12243 (or 12227 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 45.

The square root of 400648896 is about 20016.2158261745. The cubic root of 400648896 is about 737.2045100253.

The spelling of 400648896 in words is "four hundred million, six hundred forty-eight thousand, eight hundred ninety-six".