78651320 has 32 divisors (see below), whose sum is σ = 193054320. Its totient is φ = 28600320.

The previous prime is 78651319. The next prime is 78651323. The reversal of 78651320 is 2315687.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78651323) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 88937 + ... + 89816.

Almost surely, 2^78651320 is an apocalyptic number.

It is an amenable number.

78651320 is an abundant number, since it is smaller than the sum of its proper divisors (114403000).

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

78651320 is a wasteful number, since it uses less digits than its factorization.

78651320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 178775 (or 178771 counting only the distinct ones).

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

The square root of 78651320 is about 8868.5579436569. The cubic root of 78651320 is about 428.4518330843.

The spelling of 78651320 in words is "seventy-eight million, six hundred fifty-one thousand, three hundred twenty".