400740228 has 54 divisors (see below), whose sum is σ = 1178372286. Its totient is φ = 114496704.

The previous prime is 400740203. The next prime is 400740233. The reversal of 400740228 is 822047004.

It can be written as a sum of positive squares in only one way, i.e., 379782144 + 20958084 = 19488^2 + 4578^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 111825 + ... + 115352.

It is an arithmetic number, because the mean of its divisors is an integer number (21821709).

Almost surely, 2^400740228 is an apocalyptic number.

It is an amenable number.

400740228 is an abundant number, since it is smaller than the sum of its proper divisors (777632058).

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

400740228 is a wasteful number, since it uses less digits than its factorization.

400740228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227201 (or 227189 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 27.

The square root of 400740228 is about 20018.4971463894. The cubic root of 400740228 is about 737.2605235302.

The spelling of 400740228 in words is "four hundred million, seven hundred forty thousand, two hundred twenty-eight".