78521360 has 20 divisors (see below), whose sum is σ = 182562348. Its totient is φ = 31408512.

The previous prime is 78521353. The next prime is 78521383. The reversal of 78521360 is 6312587.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 32444416 + 46076944 = 5696^2 + 6788^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 490679 + ... + 490838.

Almost surely, 2^78521360 is an apocalyptic number.

It is an amenable number.

78521360 is an abundant number, since it is smaller than the sum of its proper divisors (104040988).

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

78521360 is a wasteful number, since it uses less digits than its factorization.

78521360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 981530 (or 981524 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 78521360 is about 8861.2279058830. The cubic root of 78521360 is about 428.2157179666.

The spelling of 78521360 in words is "seventy-eight million, five hundred twenty-one thousand, three hundred sixty".