78259860 has 216 divisors, whose sum is σ = 291301920. Its totient is φ = 16910208.

The previous prime is 78259859. The next prime is 78259873. The reversal of 78259860 is 6895287.

It is a super-2 number, since 2×78259860² = 12249211374439200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 71 ways as a sum of consecutive naturals, for example, 167347 + ... + 167813.

It is an arithmetic number, because the mean of its divisors is an integer number (1348620).

Almost surely, 2^78259860 is an apocalyptic number.

78259860 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 78259860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (145650960).

78259860 is an abundant number, since it is smaller than the sum of its proper divisors (213042060).

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

78259860 is a wasteful number, since it uses less digits than its factorization.

78259860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 515 (or 503 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 78259860 is about 8846.4603090728. The cubic root of 78259860 is about 427.7398264464.

The spelling of 78259860 in words is "seventy-eight million, two hundred fifty-nine thousand, eight hundred sixty".