400784466 has 16 divisors (see below), whose sum is σ = 829209600. Its totient is φ = 128988048.

The previous prime is 400784431. The next prime is 400784473. The reversal of 400784466 is 664487004.

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 7 ways as a sum of consecutive naturals, for example, 1151506 + ... + 1151853.

It is an arithmetic number, because the mean of its divisors is an integer number (51825600).

Almost surely, 2^400784466 is an apocalyptic number.

400784466 is an abundant number, since it is smaller than the sum of its proper divisors (428425134).

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

400784466 is a wasteful number, since it uses less digits than its factorization.

400784466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2303393.

The product of its (nonzero) digits is 129024, while the sum is 39.

The square root of 400784466 is about 20019.6020439968. The cubic root of 400784466 is about 737.2876514373.

It can be divided in two parts, 40078 and 4466, that added together give a palindrome (44544).

The spelling of 400784466 in words is "four hundred million, seven hundred eighty-four thousand, four hundred sixty-six".