918871560 has 64 divisors (see below), whose sum is σ = 3062908800. Its totient is φ = 245032128.

The previous prime is 918871553. The next prime is 918871561. The reversal of 918871560 is 65178819.

918871560 is a `hidden beast` number, since 9 + 1 + 8 + 87 + 1 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (918871561) 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, 424324 + ... + 426483.

It is an arithmetic number, because the mean of its divisors is an integer number (47857950).

Almost surely, 2^918871560 is an apocalyptic number.

918871560 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

918871560 is an abundant number, since it is smaller than the sum of its proper divisors (2144037240).

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

918871560 is a wasteful number, since it uses less digits than its factorization.

918871560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850827 (or 850817 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 45.

The square root of 918871560 is about 30312.8942860955. The cubic root of 918871560 is about 972.1910156526.

The spelling of 918871560 in words is "nine hundred eighteen million, eight hundred seventy-one thousand, five hundred sixty".