400407044 has 24 divisors (see below), whose sum is σ = 729528408. Its totient is φ = 192119040.

The previous prime is 400407037. The next prime is 400407047. The reversal of 400407044 is 440704004.

It can be written as a sum of positive squares in 4 ways, for example, as 239878144 + 160528900 = 15488^2 + 12670^2 .

It is not an unprimeable number, because it can be changed into a prime (400407047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7727 + ... + 29334.

It is an arithmetic number, because the mean of its divisors is an integer number (30397017).

Almost surely, 2^400407044 is an apocalyptic number.

It is an amenable number.

400407044 is a deficient number, since it is larger than the sum of its proper divisors (329121364).

400407044 is a wasteful number, since it uses less digits than its factorization.

400407044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37175 (or 37173 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 23.

The square root of 400407044 is about 20010.1735124911. The cubic root of 400407044 is about 737.0561421527.

It can be divided in two parts, 400 and 407044, that multiplied together give a square (162817600 = 12760²).

The spelling of 400407044 in words is "four hundred million, four hundred seven thousand, forty-four".