400666048 has 56 divisors (see below), whose sum is σ = 811987200. Its totient is φ = 196116480.

The previous prime is 400666043. The next prime is 400666051. The reversal of 400666048 is 840666004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400666043) 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, 892128 + ... + 892576.

Almost surely, 2^400666048 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 400666048, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (405993600).

400666048 is an abundant number, since it is smaller than the sum of its proper divisors (411321152).

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

400666048 is a wasteful number, since it uses less digits than its factorization.

400666048 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 725 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 400666048 is about 20016.6442742034. The cubic root of 400666048 is about 737.2150299189.

The spelling of 400666048 in words is "four hundred million, six hundred sixty-six thousand, forty-eight".