128879822 has 8 divisors (see below), whose sum is σ = 204691536. Its totient is φ = 60649312.

The previous prime is 128879819. The next prime is 128879897. The reversal of 128879822 is 228978821.

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

It is a super-2 number, since 2×128879822² = 33220017037503368, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1895258 + ... + 1895325.

It is an arithmetic number, because the mean of its divisors is an integer number (25586442).

Almost surely, 2^128879822 is an apocalyptic number.

128879822 is a deficient number, since it is larger than the sum of its proper divisors (75811714).

128879822 is a wasteful number, since it uses less digits than its factorization.

128879822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3790602.

The product of its digits is 258048, while the sum is 47.

The square root of 128879822 is about 11352.5249173917. The cubic root of 128879822 is about 505.1204783949.

The spelling of 128879822 in words is "one hundred twenty-eight million, eight hundred seventy-nine thousand, eight hundred twenty-two".