400351420 has 48 divisors (see below), whose sum is σ = 963684288. Its totient is φ = 136857600.

The previous prime is 400351379. The next prime is 400351447. The reversal of 400351420 is 24153004.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 45370 + ... + 53470.

It is an arithmetic number, because the mean of its divisors is an integer number (20076756).

Almost surely, 2^400351420 is an apocalyptic number.

It is an amenable number.

400351420 is an abundant number, since it is smaller than the sum of its proper divisors (563332868).

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

400351420 is a wasteful number, since it uses less digits than its factorization.

400351420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8470 (or 8468 counting only the distinct ones).

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 400351420 is about 20008.7835712219. The cubic root of 400351420 is about 737.0220102944.

The spelling of 400351420 in words is "four hundred million, three hundred fifty-one thousand, four hundred twenty".