215793830 has 32 divisors (see below), whose sum is σ = 467285760. Its totient is φ = 70092000.

The previous prime is 215793791. The next prime is 215793833. The reversal of 215793830 is 38397512.

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215793833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79796 + ... + 82455.

It is an arithmetic number, because the mean of its divisors is an integer number (14602680).

Almost surely, 2^215793830 is an apocalyptic number.

215793830 is an abundant number, since it is smaller than the sum of its proper divisors (251491930).

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

215793830 is a wasteful number, since it uses less digits than its factorization.

215793830 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162284.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 215793830 is about 14689.9227363523. The cubic root of 215793830 is about 599.8090410828.

The spelling of 215793830 in words is "two hundred fifteen million, seven hundred ninety-three thousand, eight hundred thirty".