918978480 has 160 divisors (see below), whose sum is σ = 3617625600. Its totient is φ = 210048768.

The previous prime is 918978461. The next prime is 918978521. The reversal of 918978480 is 84879819.

918978480 is a `hidden beast` number, since 91 + 8 + 9 + 78 + 480 = 666.

It is a super-2 number, since 2×918978480² = 1689042893406220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 15270 + ... + 45509.

It is an arithmetic number, because the mean of its divisors is an integer number (22610160).

Almost surely, 2^918978480 is an apocalyptic number.

918978480 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

918978480 is an abundant number, since it is smaller than the sum of its proper divisors (2698647120).

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

918978480 is a wasteful number, since it uses less digits than its factorization.

918978480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60808 (or 60796 counting only the distinct ones).

The product of its (nonzero) digits is 1161216, while the sum is 54.

The square root of 918978480 is about 30314.6578407212. The cubic root of 918978480 is about 972.2287222761.

The spelling of 918978480 in words is "nine hundred eighteen million, nine hundred seventy-eight thousand, four hundred eighty".