400744100 has 18 divisors (see below), whose sum is σ = 869614914. Its totient is φ = 160297600.

The previous prime is 400744087. The next prime is 400744117. The reversal of 400744100 is 1447004.

It can be written as a sum of positive squares in 3 ways, for example, as 984064 + 399760036 = 992^2 + 19994^2 .

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

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 5 ways as a sum of consecutive naturals, for example, 2003621 + ... + 2003820.

Almost surely, 2^400744100 is an apocalyptic number.

It is an amenable number.

400744100 is an abundant number, since it is smaller than the sum of its proper divisors (468870814).

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

400744100 is a wasteful number, since it uses less digits than its factorization.

400744100 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4007455 (or 4007448 counting only the distinct ones).

The product of its (nonzero) digits is 448, while the sum is 20.

The square root of 400744100 is about 20018.5938567123. The cubic root of 400744100 is about 737.2628980224.

The spelling of 400744100 in words is "four hundred million, seven hundred forty-four thousand, one hundred".