28790229979 has 8 divisors (see below), whose sum is σ = 34037710560. Its totient is φ = 23826397056.

The previous prime is 28790229973. The next prime is 28790229983. The reversal of 28790229979 is 97992209782.

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

It is not a de Polignac number, because 28790229979 - 2⁵ = 28790229947 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28790229979.

It is not an unprimeable number, because it can be changed into a prime (28790229973) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 70911694 + ... + 70912099.

It is an arithmetic number, because the mean of its divisors is an integer number (4254713820).

Almost surely, 2^28790229979 is an apocalyptic number.

28790229979 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28790229979 is a deficient number, since it is larger than the sum of its proper divisors (5247480581).

28790229979 is a wasteful number, since it uses less digits than its factorization.

28790229979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141823829.

The product of its (nonzero) digits is 20575296, while the sum is 64.

The spelling of 28790229979 in words is "twenty-eight billion, seven hundred ninety million, two hundred twenty-nine thousand, nine hundred seventy-nine".