400080 has 40 divisors (see below), whose sum is σ = 1240992. Its totient is φ = 106624.

The previous prime is 400069. The next prime is 400087. The reversal of 400080 is 80004.

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

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a super Niven number, because it is divisible the sum of any subset of its (nonzero) digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400087) by changing a digit.

400080 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 594 + ... + 1073.

2⁴⁰⁰⁰⁸⁰ is an apocalyptic number.

400080 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400080 is an abundant number, since it is smaller than the sum of its proper divisors (840912).

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

400080 is a wasteful number, since it uses less digits than its factorization.

400080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1683 (or 1677 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 12.

The square root of 400080 is about 632.5187744249. The cubic root of 400080 is about 73.6855416874.

Adding to 400080 its reverse (80004), we get a palindrome (480084).

The spelling of 400080 in words is "four hundred thousand, eighty".