215779480 has 32 divisors (see below), whose sum is σ = 554862240. Its totient is φ = 73981440.

The previous prime is 215779471. The next prime is 215779493. The reversal of 215779480 is 84977512.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 385041 + ... + 385600.

It is an arithmetic number, because the mean of its divisors is an integer number (17339445).

Almost surely, 2^215779480 is an apocalyptic number.

215779480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

215779480 is an abundant number, since it is smaller than the sum of its proper divisors (339082760).

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

215779480 is a wasteful number, since it uses less digits than its factorization.

215779480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 770659 (or 770655 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 215779480 is about 14689.4342981614. The cubic root of 215779480 is about 599.7957452894.

The spelling of 215779480 in words is "two hundred fifteen million, seven hundred seventy-nine thousand, four hundred eighty".