400404070 has 16 divisors (see below), whose sum is σ = 786248208. Its totient is φ = 145601440.

The previous prime is 400404049. The next prime is 400404071. The reversal of 400404070 is 70404004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400404071) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1819909 + ... + 1820128.

It is an arithmetic number, because the mean of its divisors is an integer number (49140513).

Almost surely, 2^400404070 is an apocalyptic number.

400404070 is a deficient number, since it is larger than the sum of its proper divisors (385844138).

400404070 is a wasteful number, since it uses less digits than its factorization.

400404070 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3640055.

The product of its (nonzero) digits is 448, while the sum is 19.

The square root of 400404070 is about 20010.0992001539. The cubic root of 400404070 is about 737.0543173344.

Adding to 400404070 its reverse (70404004), we get a palindrome (470808074).

The spelling of 400404070 in words is "four hundred million, four hundred four thousand, seventy".