79881648 has 80 divisors (see below), whose sum is σ = 257293056. Its totient is φ = 20747520.

The previous prime is 79881647. The next prime is 79881649. The reversal of 79881648 is 84618897.

It is an interprime number because it is at equal distance from previous prime (79881647) and next prime (79881649).

It is a self number, because there is not a number n which added to its sum of digits gives 79881648.

It is not an unprimeable number, because it can be changed into a prime (79881647) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7111 + ... + 14502.

Almost surely, 2^79881648 is an apocalyptic number.

It is an amenable number.

79881648 is an abundant number, since it is smaller than the sum of its proper divisors (177411408).

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

79881648 is a wasteful number, since it uses less digits than its factorization.

79881648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21642 (or 21636 counting only the distinct ones).

The product of its digits is 774144, while the sum is 51.

The square root of 79881648 is about 8937.6533832992. The cubic root of 79881648 is about 430.6743484248.

The spelling of 79881648 in words is "seventy-nine million, eight hundred eighty-one thousand, six hundred forty-eight".