215028732 has 12 divisors (see below), whose sum is σ = 501733736. Its totient is φ = 71676240.

The previous prime is 215028731. The next prime is 215028739. The reversal of 215028732 is 237820512.

It is a tau number, because it is divible by the number of its divisors (12).

It is a self number, because there is not a number n which added to its sum of digits gives 215028732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215028731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8959519 + ... + 8959542.

Almost surely, 2^215028732 is an apocalyptic number.

It is an amenable number.

215028732 is an abundant number, since it is smaller than the sum of its proper divisors (286705004).

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

215028732 is a wasteful number, since it uses less digits than its factorization.

215028732 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17919068 (or 17919066 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 215028732 is about 14663.8580189526. The cubic root of 215028732 is about 599.0993264328.

The spelling of 215028732 in words is "two hundred fifteen million, twenty-eight thousand, seven hundred thirty-two".