400260440 has 16 divisors (see below), whose sum is σ = 900586080. Its totient is φ = 160104160.

The previous prime is 400260431. The next prime is 400260451. The reversal of 400260440 is 44062004.

It is a Harshad number since it is a multiple of its sum of digits (20).

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 3 ways as a sum of consecutive naturals, for example, 5003216 + ... + 5003295.

It is an arithmetic number, because the mean of its divisors is an integer number (56286630).

Almost surely, 2^400260440 is an apocalyptic number.

400260440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400260440 is an abundant number, since it is smaller than the sum of its proper divisors (500325640).

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

400260440 is a wasteful number, since it uses less digits than its factorization.

400260440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10006522 (or 10006518 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 400260440 is about 20006.5099405169. The cubic root of 400260440 is about 736.9661765617.

The spelling of 400260440 in words is "four hundred million, two hundred sixty thousand, four hundred forty".