215860080 has 80 divisors (see below), whose sum is σ = 685518624. Its totient is φ = 56156160.

The previous prime is 215860069. The next prime is 215860111. The reversal of 215860080 is 80068512.

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

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1129 + ... + 20808.

Almost surely, 2^215860080 is an apocalyptic number.

215860080 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 215860080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (342759312).

215860080 is an abundant number, since it is smaller than the sum of its proper divisors (469658544).

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

215860080 is a wasteful number, since it uses less digits than its factorization.

215860080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21994 (or 21988 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 215860080 is about 14692.1775104986. The cubic root of 215860080 is about 599.8704164600.

The spelling of 215860080 in words is "two hundred fifteen million, eight hundred sixty thousand, eighty".