28650285280 has 48 divisors (see below), whose sum is σ = 68501828304. Its totient is φ = 11322035200.

The previous prime is 28650285263. The next prime is 28650285299. The reversal of 28650285280 is 8258205682.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 28650285280.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1065421 + ... + 1091980.

It is an arithmetic number, because the mean of its divisors is an integer number (1427121423).

Almost surely, 2^28650285280 is an apocalyptic number.

28650285280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28650285280 is an abundant number, since it is smaller than the sum of its proper divisors (39851543024).

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

28650285280 is a wasteful number, since it uses less digits than its factorization.

28650285280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2157499 (or 2157491 counting only the distinct ones).

The product of its (nonzero) digits is 614400, while the sum is 46.

The spelling of 28650285280 in words is "twenty-eight billion, six hundred fifty million, two hundred eighty-five thousand, two hundred eighty".