78889860 has 288 divisors, whose sum is σ = 301916160. Its totient is φ = 16257024.

The previous prime is 78889849. The next prime is 78889879. The reversal of 78889860 is 6898887.

It is a super-2 number, since 2×78889860² = 12447220021639200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 78889797 and 78889806.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 621117 + ... + 621243.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^78889860 is an apocalyptic number.

78889860 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 78889860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (150958080).

78889860 is an abundant number, since it is smaller than the sum of its proper divisors (223026300).

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

78889860 is a wasteful number, since it uses less digits than its factorization.

78889860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 195 (or 190 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 54.

The square root of 78889860 is about 8881.9963972071. The cubic root of 78889860 is about 428.8845435629.

The spelling of 78889860 in words is "seventy-eight million, eight hundred eighty-nine thousand, eight hundred sixty".