78620624 has 80 divisors (see below), whose sum is σ = 168739200. Its totient is φ = 35363328.

The previous prime is 78620617. The next prime is 78620629. The reversal of 78620624 is 42602687.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78620629) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 565547 + ... + 565685.

It is an arithmetic number, because the mean of its divisors is an integer number (2109240).

Almost surely, 2^78620624 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78620624, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84369600).

78620624 is an abundant number, since it is smaller than the sum of its proper divisors (90118576).

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

78620624 is a wasteful number, since it uses less digits than its factorization.

78620624 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 246 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 35.

The square root of 78620624 is about 8866.8271664672. The cubic root of 78620624 is about 428.3960871718.

The spelling of 78620624 in words is "seventy-eight million, six hundred twenty thousand, six hundred twenty-four".