78622650 has 96 divisors (see below), whose sum is σ = 219628800. Its totient is φ = 20936880.

The previous prime is 78622573. The next prime is 78622651. The reversal of 78622650 is 5622687.

It is not an unprimeable number, because it can be changed into a prime (78622651) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 108991 + ... + 109709.

It is an arithmetic number, because the mean of its divisors is an integer number (2287800).

Almost surely, 2^78622650 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78622650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109814400).

78622650 is an abundant number, since it is smaller than the sum of its proper divisors (141006150).

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

78622650 is an equidigital number, since it uses as much as digits as its factorization.

78622650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 729 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 36.

The square root of 78622650 is about 8866.9414117834. The cubic root of 78622650 is about 428.3997669655.

It can be divided in two parts, 786 and 22650, that added together give a triangular number (23436 = T₂₁₆).

The spelling of 78622650 in words is "seventy-eight million, six hundred twenty-two thousand, six hundred fifty".