28241784490 has 36 divisors (see below), whose sum is σ = 53670756006. Its totient is φ = 10698323616.

The previous prime is 28241784391. The next prime is 28241784511. The reversal of 28241784490 is 9448714282.

It can be written as a sum of positive squares in 3 ways, for example, as 26967223089 + 1274561401 = 164217^2 + 35701^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 10095772 + ... + 10098568.

Almost surely, 2^28241784490 is an apocalyptic number.

28241784490 is a deficient number, since it is larger than the sum of its proper divisors (25428971516).

28241784490 is an frugal number, since it uses more digits than its factorization.

28241784490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5639 (or 2823 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 49.

The spelling of 28241784490 in words is "twenty-eight billion, two hundred forty-one million, seven hundred eighty-four thousand, four hundred ninety".