79817272 has 16 divisors (see below), whose sum is σ = 150282000. Its totient is φ = 39742080.

The previous prime is 79817267. The next prime is 79817279. The reversal of 79817272 is 27271897.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79817279) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18772 + ... + 22627.

It is an arithmetic number, because the mean of its divisors is an integer number (9392625).

Almost surely, 2^79817272 is an apocalyptic number.

It is an amenable number.

79817272 is a deficient number, since it is larger than the sum of its proper divisors (70464728).

79817272 is a wasteful number, since it uses less digits than its factorization.

79817272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41646 (or 41642 counting only the distinct ones).

The product of its digits is 98784, while the sum is 43.

The square root of 79817272 is about 8934.0512646839. The cubic root of 79817272 is about 430.5586249610.

It can be divided in two parts, 79817 and 272, that added together give a square (80089 = 283²).

The spelling of 79817272 in words is "seventy-nine million, eight hundred seventeen thousand, two hundred seventy-two".