400313240 has 32 divisors (see below), whose sum is σ = 917704080. Its totient is φ = 157103232.

The previous prime is 400313237. The next prime is 400313257. The reversal of 400313240 is 42313004.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92294 + ... + 96533.

Almost surely, 2^400313240 is an apocalyptic number.

400313240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400313240 is an abundant number, since it is smaller than the sum of its proper divisors (517390840).

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

400313240 is a wasteful number, since it uses less digits than its factorization.

400313240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 188891 (or 188887 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400313240 is about 20007.8294674860. The cubic root of 400313240 is about 736.9985805495.

Adding to 400313240 its reverse (42313004), we get a palindrome (442626244).

The spelling of 400313240 in words is "four hundred million, three hundred thirteen thousand, two hundred forty".