78324620 has 48 divisors (see below), whose sum is σ = 181929888. Its totient is φ = 28085760.

The previous prime is 78324613. The next prime is 78324647. The reversal of 78324620 is 2642387.

It is a super-2 number, since 2×78324620² = 12269492196288800, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13622 + ... + 18498.

It is an arithmetic number, because the mean of its divisors is an integer number (3790206).

Almost surely, 2^78324620 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 78324620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90964944).

78324620 is an abundant number, since it is smaller than the sum of its proper divisors (103605268).

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

78324620 is a wasteful number, since it uses less digits than its factorization.

78324620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4970 (or 4968 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 78324620 is about 8850.1197732008. The cubic root of 78324620 is about 427.8577787572.

The spelling of 78324620 in words is "seventy-eight million, three hundred twenty-four thousand, six hundred twenty".