78274160 has 20 divisors (see below), whose sum is σ = 181987608. Its totient is φ = 31309632.

The previous prime is 78274159. The next prime is 78274181. The reversal of 78274160 is 6147287.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×78274160² = 12253688247411200, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 78274160.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 489134 + ... + 489293.

Almost surely, 2^78274160 is an apocalyptic number.

It is an amenable number.

78274160 is an abundant number, since it is smaller than the sum of its proper divisors (103713448).

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

78274160 is a wasteful number, since it uses less digits than its factorization.

78274160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 978440 (or 978434 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 78274160 is about 8847.2685050246. The cubic root of 78274160 is about 427.7658777197.

The spelling of 78274160 in words is "seventy-eight million, two hundred seventy-four thousand, one hundred sixty".