79428145 has 4 divisors (see below), whose sum is σ = 95313780. Its totient is φ = 63542512.

The previous prime is 79428143. The next prime is 79428157. The reversal of 79428145 is 54182497.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 49660209 + 29767936 = 7047^2 + 5456^2 .

It is a cyclic number.

It is not a de Polignac number, because 79428145 - 2¹ = 79428143 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 79428098 and 79428107.

It is not an unprimeable number, because it can be changed into a prime (79428143) 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, 7942810 + ... + 7942819.

It is an arithmetic number, because the mean of its divisors is an integer number (23828445).

Almost surely, 2^79428145 is an apocalyptic number.

It is an amenable number.

79428145 is a deficient number, since it is larger than the sum of its proper divisors (15885635).

79428145 is a wasteful number, since it uses less digits than its factorization.

79428145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15885634.

The product of its digits is 80640, while the sum is 40.

The square root of 79428145 is about 8912.2469108525. The cubic root of 79428145 is about 429.8577950535.

The spelling of 79428145 in words is "seventy-nine million, four hundred twenty-eight thousand, one hundred forty-five".