400899060 has 72 divisors (see below), whose sum is σ = 1228650696. Its totient is φ = 105799680.

The previous prime is 400899017. The next prime is 400899071. The reversal of 400899060 is 60998004.

It can be written as a sum of positive squares in 4 ways, for example, as 59166864 + 341732196 = 7692^2 + 18486^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 5980 + ... + 28940.

It is an arithmetic number, because the mean of its divisors is an integer number (17064593).

Almost surely, 2^400899060 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 400899060, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (614325348).

400899060 is an abundant number, since it is smaller than the sum of its proper divisors (827751636).

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

400899060 is a wasteful number, since it uses less digits than its factorization.

400899060 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23073 (or 23068 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 400899060 is about 20022.4638843475. The cubic root of 400899060 is about 737.3579142154.

The spelling of 400899060 in words is "four hundred million, eight hundred ninety-nine thousand, sixty".