28839560 has 32 divisors (see below), whose sum is σ = 65626200. Its totient is φ = 11404800.

The previous prime is 28839557. The next prime is 28839583. The reversal of 28839560 is 6593882.

It can be written as a sum of positive squares in 4 ways, for example, as 27102436 + 1737124 = 5206^2 + 1318^2 .

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, 491 + ... + 7610.

Almost surely, 2^28839560 is an apocalyptic number.

28839560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28839560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (32813100).

28839560 is an abundant number, since it is smaller than the sum of its proper divisors (36786640).

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

28839560 is a wasteful number, since it uses less digits than its factorization.

28839560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8201 (or 8197 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 28839560 is about 5370.2476665420. The cubic root of 28839560 is about 306.6640568986.

The spelling of 28839560 in words is "twenty-eight million, eight hundred thirty-nine thousand, five hundred sixty".