28820220142 has 12 divisors (see below), whose sum is σ = 50288343480. Its totient is φ = 12351522876.

The previous prime is 28820220119. The next prime is 28820220181. The reversal of 28820220142 is 24102202882.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 147041842 + ... + 147042037.

It is an arithmetic number, because the mean of its divisors is an integer number (4190695290).

Almost surely, 2^28820220142 is an apocalyptic number.

28820220142 is a deficient number, since it is larger than the sum of its proper divisors (21468123338).

28820220142 is a wasteful number, since it uses less digits than its factorization.

28820220142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 294083895 (or 294083888 counting only the distinct ones).

The product of its (nonzero) digits is 8192, while the sum is 31.

The spelling of 28820220142 in words is "twenty-eight billion, eight hundred twenty million, two hundred twenty thousand, one hundred forty-two".