400535444 has 6 divisors (see below), whose sum is σ = 700937034. Its totient is φ = 200267720.

The previous prime is 400535441. The next prime is 400535449. The reversal of 400535444 is 444535004.

It can be written as a sum of positive squares in only one way, i.e., 284327044 + 116208400 = 16862^2 + 10780^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400535441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 50066927 + ... + 50066934.

It is an arithmetic number, because the mean of its divisors is an integer number (116822839).

Almost surely, 2^400535444 is an apocalyptic number.

It is an amenable number.

400535444 is a deficient number, since it is larger than the sum of its proper divisors (300401590).

400535444 is a wasteful number, since it uses less digits than its factorization.

400535444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100133865 (or 100133863 counting only the distinct ones).

The product of its (nonzero) digits is 19200, while the sum is 29.

The square root of 400535444 is about 20013.3816233039. The cubic root of 400535444 is about 737.1349185678.

The spelling of 400535444 in words is "four hundred million, five hundred thirty-five thousand, four hundred forty-four".