78522630 has 64 divisors (see below), whose sum is σ = 199445760. Its totient is φ = 19730304.

The previous prime is 78522607. The next prime is 78522641. The reversal of 78522630 is 3622587.

It is a junction number, because it is equal to n+sod(n) for n = 78522591 and 78522600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 197592 + ... + 197988.

It is an arithmetic number, because the mean of its divisors is an integer number (3116340).

Almost surely, 2^78522630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78522630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99722880).

78522630 is an abundant number, since it is smaller than the sum of its proper divisors (120923130).

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

78522630 is a wasteful number, since it uses less digits than its factorization.

78522630 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773.

The product of its (nonzero) digits is 20160, while the sum is 33.

The square root of 78522630 is about 8861.2995660907. The cubic root of 78522630 is about 428.2180265997.

The spelling of 78522630 in words is "seventy-eight million, five hundred twenty-two thousand, six hundred thirty".