402144309928 has 32 divisors (see below), whose sum is σ = 754814073600. Its totient is φ = 200860668288.

The previous prime is 402144309877. The next prime is 402144309929. The reversal of 402144309928 is 829903441204.

It is not an unprimeable number, because it can be changed into a prime (402144309929) 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, 48841300 + ... + 48849532.

It is an arithmetic number, because the mean of its divisors is an integer number (23587939800).

Almost surely, 2^402144309928 is an apocalyptic number.

It is an amenable number.

402144309928 is a deficient number, since it is larger than the sum of its proper divisors (352669763672).

402144309928 is a wasteful number, since it uses less digits than its factorization.

402144309928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13921 (or 13917 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 402144309928 in words is "four hundred two billion, one hundred forty-four million, three hundred nine thousand, nine hundred twenty-eight".