400000140 has 96 divisors (see below), whose sum is σ = 1317677760. Its totient is φ = 100389888.

The previous prime is 400000109. The next prime is 400000151. The reversal of 400000140 is 41000004.

It is a super-2 number, since 2×400000140² = 320000224000039200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12607 + ... + 30966.

It is an arithmetic number, because the mean of its divisors is an integer number (13725810).

Almost surely, 2^400000140 is an apocalyptic number.

It is an amenable number.

400000140 is an abundant number, since it is smaller than the sum of its proper divisors (917677620).

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

400000140 is a wasteful number, since it uses less digits than its factorization.

400000140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43608 (or 43600 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 400000140 is about 20000.0034999997. The cubic root of 400000140 is about 736.8063856888.

Adding to 400000140 its reverse (41000004), we get a palindrome (441000144).

The spelling of 400000140 in words is "four hundred million, one hundred forty", and thus it is an aban number.