78706530 has 96 divisors (see below), whose sum is σ = 235243008. Its totient is φ = 17884800.

The previous prime is 78706519. The next prime is 78706543. The reversal of 78706530 is 3560787.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 170500 + ... + 170960.

It is an arithmetic number, because the mean of its divisors is an integer number (2450448).

Almost surely, 2^78706530 is an apocalyptic number.

78706530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 78706530, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (117621504).

78706530 is an abundant number, since it is smaller than the sum of its proper divisors (156536478).

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

78706530 is a wasteful number, since it uses less digits than its factorization.

78706530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752 (or 749 counting only the distinct ones).

The product of its (nonzero) digits is 35280, while the sum is 36.

The square root of 78706530 is about 8871.6700795284. The cubic root of 78706530 is about 428.5520615058.

It can be divided in two parts, 7870 and 6530, that added together give a square (14400 = 120²).

The spelling of 78706530 in words is "seventy-eight million, seven hundred six thousand, five hundred thirty".