78872730 has 16 divisors (see below), whose sum is σ = 189294624. Its totient is φ = 21032720.

The previous prime is 78872723. The next prime is 78872747. The reversal of 78872730 is 3727887.

It is a Curzon 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 7 ways as a sum of consecutive naturals, for example, 1314516 + ... + 1314575.

It is an arithmetic number, because the mean of its divisors is an integer number (11830914).

Almost surely, 2^78872730 is an apocalyptic number.

78872730 is an abundant number, since it is smaller than the sum of its proper divisors (110421894).

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

78872730 is a wasteful number, since it uses less digits than its factorization.

78872730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2629101.

The product of its (nonzero) digits is 131712, while the sum is 42.

The square root of 78872730 is about 8881.0320346230. The cubic root of 78872730 is about 428.8534989139.

The spelling of 78872730 in words is "seventy-eight million, eight hundred seventy-two thousand, seven hundred thirty".