215898960 has 80 divisors (see below), whose sum is σ = 678510144. Its totient is φ = 56779776.

The previous prime is 215898941. The next prime is 215898961. The reversal of 215898960 is 69898512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×215898960² = 93224721858163200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (215898961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11359 + ... + 23681.

Almost surely, 2^215898960 is an apocalyptic number.

215898960 is a gapful number since it is divisible by the number (20) 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 215898960, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (339255072).

215898960 is an abundant number, since it is smaller than the sum of its proper divisors (462611184).

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

215898960 is a wasteful number, since it uses less digits than its factorization.

215898960 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12412 (or 12406 counting only the distinct ones).

The product of its (nonzero) digits is 311040, while the sum is 48.

The square root of 215898960 is about 14693.5006040086. The cubic root of 215898960 is about 599.9064298529.

The spelling of 215898960 in words is "two hundred fifteen million, eight hundred ninety-eight thousand, nine hundred sixty".