79888378 has 4 divisors (see below), whose sum is σ = 119832570. Its totient is φ = 39944188.

The previous prime is 79888373. The next prime is 79888381. The reversal of 79888378 is 87388897.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 87388897 = 109 ⋅801733.

It can be written as a sum of positive squares in only one way, i.e., 67519089 + 12369289 = 8217^2 + 3517^2 .

It is not an unprimeable number, because it can be changed into a prime (79888373) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972093 + ... + 19972096.

Almost surely, 2^79888378 is an apocalyptic number.

79888378 is a deficient number, since it is larger than the sum of its proper divisors (39944192).

79888378 is a wasteful number, since it uses less digits than its factorization.

79888378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39944191.

The product of its digits is 5419008, while the sum is 58.

The square root of 79888378 is about 8938.0298724048. The cubic root of 79888378 is about 430.6864428047.

The spelling of 79888378 in words is "seventy-nine million, eight hundred eighty-eight thousand, three hundred seventy-eight".