400371140 has 36 divisors (see below), whose sum is σ = 910437444. Its totient is φ = 147828096.

The previous prime is 400371119. The next prime is 400371149. The reversal of 400371140 is 41173004.

It can be written as a sum of positive squares in 6 ways, for example, as 193989184 + 206381956 = 13928^2 + 14366^2 .

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

It is not an unprimeable number, because it can be changed into a prime (400371149) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 55847 + ... + 62606.

It is an arithmetic number, because the mean of its divisors is an integer number (25289929).

Almost surely, 2^400371140 is an apocalyptic number.

It is an amenable number.

400371140 is an abundant number, since it is smaller than the sum of its proper divisors (510066304).

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

400371140 is a wasteful number, since it uses less digits than its factorization.

400371140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118488 (or 118473 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 400371140 is about 20009.2763487339. The cubic root of 400371140 is about 737.0341111927.

The spelling of 400371140 in words is "four hundred million, three hundred seventy-one thousand, one hundred forty".