400731048 has 192 divisors, whose sum is σ = 1195084800. Its totient is φ = 120960000.

The previous prime is 400731043. The next prime is 400731049. The reversal of 400731048 is 840137004.

It is not an unprimeable number, because it can be changed into a prime (400731041) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2653773 + ... + 2653923.

It is an arithmetic number, because the mean of its divisors is an integer number (6224400).

Almost surely, 2^400731048 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 400731048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (597542400).

400731048 is an abundant number, since it is smaller than the sum of its proper divisors (794353752).

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

400731048 is a wasteful number, since it uses less digits than its factorization.

400731048 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 400731048 is about 20018.2678571349. The cubic root of 400731048 is about 737.2548938623.

The spelling of 400731048 in words is "four hundred million, seven hundred thirty-one thousand, forty-eight".