28825000 has 48 divisors (see below), whose sum is σ = 67612860. Its totient is φ = 11520000.

The previous prime is 28824953. The next prime is 28825031. The reversal of 28825000 is 52882.

It can be written as a sum of positive squares in 6 ways, for example, as 1136356 + 27688644 = 1066^2 + 5262^2 .

It is a Harshad number since it is a multiple of its sum of digits (25).

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, 24424 + ... + 25576.

Almost surely, 2^28825000 is an apocalyptic number.

28825000 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 28825000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33806430).

28825000 is an abundant number, since it is smaller than the sum of its proper divisors (38787860).

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

28825000 is an equidigital number, since it uses as much as digits as its factorization.

28825000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1184 (or 1160 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 25.

The square root of 28825000 is about 5368.8918782184. The cubic root of 28825000 is about 306.6124405276.

Adding to 28825000 its reverse (52882), we get a palindrome (28877882).

The spelling of 28825000 in words is "twenty-eight million, eight hundred twenty-five thousand".