400506340 has 36 divisors (see below), whose sum is σ = 910744884. Its totient is φ = 147878016.

The previous prime is 400506331. The next prime is 400506361. The reversal of 400506340 is 43605004.

It can be written as a sum of positive squares in 6 ways, for example, as 166048996 + 234457344 = 12886^2 + 15312^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 55867 + ... + 62626.

It is an arithmetic number, because the mean of its divisors is an integer number (25298469).

Almost surely, 2^400506340 is an apocalyptic number.

It is an amenable number.

400506340 is an abundant number, since it is smaller than the sum of its proper divisors (510238544).

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

400506340 is a wasteful number, since it uses less digits than its factorization.

400506340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118528 (or 118513 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 400506340 is about 20012.6544965929. The cubic root of 400506340 is about 737.1170640561.

The spelling of 400506340 in words is "four hundred million, five hundred six thousand, three hundred forty".