400877380 has 12 divisors (see below), whose sum is σ = 841842540. Its totient is φ = 160350944.

The previous prime is 400877369. The next prime is 400877381. The reversal of 400877380 is 83778004.

It can be written as a sum of positive squares in 2 ways, for example, as 102900736 + 297976644 = 10144^2 + 17262^2 .

It is not an unprimeable number, because it can be changed into a prime (400877381) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10021915 + ... + 10021954.

It is an arithmetic number, because the mean of its divisors is an integer number (70153545).

Almost surely, 2^400877380 is an apocalyptic number.

It is an amenable number.

400877380 is an abundant number, since it is smaller than the sum of its proper divisors (440965160).

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

400877380 is a wasteful number, since it uses less digits than its factorization.

400877380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20043878 (or 20043876 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 37.

The square root of 400877380 is about 20021.9224851162. The cubic root of 400877380 is about 737.3446222513.

The spelling of 400877380 in words is "four hundred million, eight hundred seventy-seven thousand, three hundred eighty".