400140080 has 40 divisors (see below), whose sum is σ = 944223792. Its totient is φ = 157665024.

The previous prime is 400140071. The next prime is 400140109. The reversal of 400140080 is 80041004.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×400140080² = 320224167244812800, which contains 22 as substring.

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, 31967 + ... + 42686.

Almost surely, 2^400140080 is an apocalyptic number.

400140080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400140080 is an abundant number, since it is smaller than the sum of its proper divisors (544083712).

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

400140080 is a wasteful number, since it uses less digits than its factorization.

400140080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 74733 (or 74727 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 400140080 is about 20003.5016934536. The cubic root of 400140080 is about 736.8922995452.

Adding to 400140080 its reverse (80041004), we get a palindrome (480181084).

The spelling of 400140080 in words is "four hundred million, one hundred forty thousand, eighty".