78999422 has 8 divisors (see below), whose sum is σ = 122585400. Its totient is φ = 38137624.

The previous prime is 78999421. The next prime is 78999443. The reversal of 78999422 is 22499987.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78999421) 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, 680972 + ... + 681087.

It is an arithmetic number, because the mean of its divisors is an integer number (15323175).

Almost surely, 2^78999422 is an apocalyptic number.

78999422 is a deficient number, since it is larger than the sum of its proper divisors (43585978).

78999422 is a wasteful number, since it uses less digits than its factorization.

78999422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362090.

The product of its digits is 653184, while the sum is 50.

The square root of 78999422 is about 8888.1619022158. The cubic root of 78999422 is about 429.0829962419.

The spelling of 78999422 in words is "seventy-eight million, nine hundred ninety-nine thousand, four hundred twenty-two".