78763220 has 24 divisors (see below), whose sum is σ = 167265000. Its totient is φ = 31150592.

The previous prime is 78763213. The next prime is 78763231. The reversal of 78763220 is 2236787.

It can be written as a sum of positive squares in 4 ways, for example, as 2515396 + 76247824 = 1586^2 + 8732^2 .

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 7 ways as a sum of consecutive naturals, for example, 20345 + ... + 23904.

It is an arithmetic number, because the mean of its divisors is an integer number (6969375).

Almost surely, 2^78763220 is an apocalyptic number.

It is an amenable number.

78763220 is an abundant number, since it is smaller than the sum of its proper divisors (88501780).

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

78763220 is a wasteful number, since it uses less digits than its factorization.

78763220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44347 (or 44345 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 78763220 is about 8874.8645060080. The cubic root of 78763220 is about 428.6549279634.

The spelling of 78763220 in words is "seventy-eight million, seven hundred sixty-three thousand, two hundred twenty".