28779140290250 has 64 divisors (see below), whose sum is σ = 62013871745280. Its totient is φ = 9796147156800.

The previous prime is 28779140290207. The next prime is 28779140290291. The reversal of 28779140290250 is 5209204197782.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 58912229 + ... + 59398728.

It is an arithmetic number, because the mean of its divisors is an integer number (968966746020).

Almost surely, 2^{28779140290250} is an apocalyptic number.

28779140290250 is an abundant number, since it is smaller than the sum of its proper divisors (33234731455030).

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

28779140290250 is a wasteful number, since it uses less digits than its factorization.

28779140290250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 118311120 (or 118311110 counting only the distinct ones).

The product of its (nonzero) digits is 5080320, while the sum is 56.

The spelling of 28779140290250 in words is "twenty-eight trillion, seven hundred seventy-nine billion, one hundred forty million, two hundred ninety thousand, two hundred fifty".