78923530 has 32 divisors (see below), whose sum is σ = 170904960. Its totient is φ = 25634880.

The previous prime is 78923527. The next prime is 78923561. The reversal of 78923530 is 3532987.

It is a self number, because there is not a number n which added to its sum of digits gives 78923530.

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 15 ways as a sum of consecutive naturals, for example, 28341 + ... + 31000.

It is an arithmetic number, because the mean of its divisors is an integer number (5340780).

Almost surely, 2^78923530 is an apocalyptic number.

78923530 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

78923530 is an abundant number, since it is smaller than the sum of its proper divisors (91981430).

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

78923530 is a wasteful number, since it uses less digits than its factorization.

78923530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59374.

The product of its (nonzero) digits is 45360, while the sum is 37.

The square root of 78923530 is about 8883.8916022203. The cubic root of 78923530 is about 428.9455505105.

The spelling of 78923530 in words is "seventy-eight million, nine hundred twenty-three thousand, five hundred thirty".