79978602 has 16 divisors (see below), whose sum is σ = 174498912. Its totient is φ = 24235920.

The previous prime is 79978597. The next prime is 79978609. The reversal of 79978602 is 20687997.

It is not an unprimeable number, because it can be changed into a prime (79978609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 605833 + ... + 605964.

It is an arithmetic number, because the mean of its divisors is an integer number (10906182).

Almost surely, 2^79978602 is an apocalyptic number.

79978602 is an abundant number, since it is smaller than the sum of its proper divisors (94520310).

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

79978602 is a wasteful number, since it uses less digits than its factorization.

79978602 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1211813.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 79978602 is about 8943.0756454365. The cubic root of 79978602 is about 430.8485174194.

Subtracting from 79978602 its reverse (20687997), we obtain a triangular number (59290605 = T₁₀₈₈₉).

It can be divided in two parts, 799 and 78602, that added together give a triangular number (79401 = T₃₉₈).

The spelling of 79978602 in words is "seventy-nine million, nine hundred seventy-eight thousand, six hundred two".