215378587328 has 28 divisors (see below), whose sum is σ = 432801918240. Its totient is φ = 106326135552.

The previous prime is 215378587283. The next prime is 215378587363. The reversal of 215378587328 is 823785873512.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21294251 + ... + 21304362.

Almost surely, 2^215378587328 is an apocalyptic number.

It is an amenable number.

215378587328 is an abundant number, since it is smaller than the sum of its proper divisors (217423330912).

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

215378587328 is an equidigital number, since it uses as much as digits as its factorization.

215378587328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42598704 (or 42598694 counting only the distinct ones).

The product of its digits is 22579200, while the sum is 59.

The spelling of 215378587328 in words is "two hundred fifteen billion, three hundred seventy-eight million, five hundred eighty-seven thousand, three hundred twenty-eight".