402536897280 has 432 divisors, whose sum is σ = 1624197556800. Its totient is φ = 92007530496.

The previous prime is 402536897249. The next prime is 402536897281. The reversal of 402536897280 is 82798635204.

402536897280 is a `hidden beast` number, since 4 + 0 + 2 + 536 + 89 + 7 + 28 + 0 = 666.

It is not an unprimeable number, because it can be changed into a prime (402536897281) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 3900424 + ... + 4002296.

Almost surely, 2^402536897280 is an apocalyptic number.

402536897280 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 402536897280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (812098778400).

402536897280 is an abundant number, since it is smaller than the sum of its proper divisors (1221660659520).

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

402536897280 is a wasteful number, since it uses less digits than its factorization.

402536897280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 101921 (or 101890 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 402536897280 in words is "four hundred two billion, five hundred thirty-six million, eight hundred ninety-seven thousand, two hundred eighty".