400845180 has 48 divisors (see below), whose sum is σ = 1135903104. Its totient is φ = 105602880.

The previous prime is 400845167. The next prime is 400845209. The reversal of 400845180 is 81548004.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 35266 + ... + 45225.

It is an arithmetic number, because the mean of its divisors is an integer number (23664648).

Almost surely, 2^400845180 is an apocalyptic number.

It is an amenable number.

400845180 is an abundant number, since it is smaller than the sum of its proper divisors (735057924).

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

400845180 is a wasteful number, since it uses less digits than its factorization.

400845180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80586 (or 80584 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 30.

The square root of 400845180 is about 20021.1183503819. The cubic root of 400845180 is about 737.3248796119.

The spelling of 400845180 in words is "four hundred million, eight hundred forty-five thousand, one hundred eighty".