400904284 has 12 divisors (see below), whose sum is σ = 765362808. Its totient is φ = 182229200.

The previous prime is 400904281. The next prime is 400904291. The reversal of 400904284 is 482409004.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400904281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4555687 + ... + 4555774.

It is an arithmetic number, because the mean of its divisors is an integer number (63780234).

Almost surely, 2^400904284 is an apocalyptic number.

400904284 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

400904284 is a deficient number, since it is larger than the sum of its proper divisors (364458524).

400904284 is a wasteful number, since it uses less digits than its factorization.

400904284 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9111476 (or 9111474 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 31.

The square root of 400904284 is about 20022.5943373979. The cubic root of 400904284 is about 737.3611169675.

The spelling of 400904284 in words is "four hundred million, nine hundred four thousand, two hundred eighty-four".