78786500 has 192 divisors, whose sum is σ = 211341312. Its totient is φ = 25344000.

The previous prime is 78786497. The next prime is 78786503. The reversal of 78786500 is 568787.

It is an interprime number because it is at equal distance from previous prime (78786497) and next prime (78786503).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78786503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2541485 + ... + 2541515.

It is an arithmetic number, because the mean of its divisors is an integer number (1100736).

Almost surely, 2^78786500 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 78786500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (105670656).

78786500 is an abundant number, since it is smaller than the sum of its proper divisors (132554812).

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

78786500 is a wasteful number, since it uses less digits than its factorization.

78786500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103 (or 91 counting only the distinct ones).

The product of its (nonzero) digits is 94080, while the sum is 41.

The square root of 78786500 is about 8876.1759784267. The cubic root of 78786500 is about 428.6971562340.

The spelling of 78786500 in words is "seventy-eight million, seven hundred eighty-six thousand, five hundred".