400662440 has 16 divisors (see below), whose sum is σ = 901490580. Its totient is φ = 160264960.

The previous prime is 400662439. The next prime is 400662467. The reversal of 400662440 is 44266004.

It can be written as a sum of positive squares in 2 ways, for example, as 397683364 + 2979076 = 19942^2 + 1726^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5008241 + ... + 5008320.

Almost surely, 2^400662440 is an apocalyptic number.

400662440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400662440 is an abundant number, since it is smaller than the sum of its proper divisors (500828140).

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

400662440 is a wasteful number, since it uses less digits than its factorization.

400662440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10016572 (or 10016568 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 26.

The square root of 400662440 is about 20016.5541490038. The cubic root of 400662440 is about 737.2128170372.

The spelling of 400662440 in words is "four hundred million, six hundred sixty-two thousand, four hundred forty".