79928849 has 72 divisors (see below), whose sum is σ = 118445544. Its totient is φ = 53222400.

The previous prime is 79928833. The next prime is 79928861. The reversal of 79928849 is 94882997.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 148225 + 79780624 = 385^2 + 8932^2 .

It is not a de Polignac number, because 79928849 - 2⁴ = 79928833 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79928794 and 79928803.

It is not an unprimeable number, because it can be changed into a prime (79928809) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1310279 + ... + 1310339.

It is an arithmetic number, because the mean of its divisors is an integer number (1645077).

Almost surely, 2^79928849 is an apocalyptic number.

It is an amenable number.

79928849 is a deficient number, since it is larger than the sum of its proper divisors (38516695).

79928849 is a wasteful number, since it uses less digits than its factorization.

79928849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127 (or 109 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 56.

The square root of 79928849 is about 8940.2935634128. The cubic root of 79928849 is about 430.7591582981.

The spelling of 79928849 in words is "seventy-nine million, nine hundred twenty-eight thousand, eight hundred forty-nine".