28789925 has 12 divisors (see below), whose sum is σ = 37800036. Its totient is φ = 21676800.

The previous prime is 28789903. The next prime is 28789931. The reversal of 28789925 is 52998782.

It can be written as a sum of positive squares in 6 ways, for example, as 124609 + 28665316 = 353^2 + 5354^2 .

It is not a de Polignac number, because 28789925 - 2¹⁰ = 28788901 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33446 + ... + 34295.

It is an arithmetic number, because the mean of its divisors is an integer number (3150003).

Almost surely, 2^28789925 is an apocalyptic number.

28789925 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

28789925 is a deficient number, since it is larger than the sum of its proper divisors (9010111).

28789925 is a wasteful number, since it uses less digits than its factorization.

28789925 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67768 (or 67763 counting only the distinct ones).

The product of its digits is 725760, while the sum is 50.

The square root of 28789925 is about 5365.6243811881. The cubic root of 28789925 is about 306.4880254204.

The spelling of 28789925 in words is "twenty-eight million, seven hundred eighty-nine thousand, nine hundred twenty-five".