28526140 has 48 divisors (see below), whose sum is σ = 62596800. Its totient is φ = 10906112.

The previous prime is 28526129. The next prime is 28526171. The reversal of 28526140 is 4162582.

It is a junction number, because it is equal to n+sod(n) for n = 28526099 and 28526108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 79281 + ... + 79639.

It is an arithmetic number, because the mean of its divisors is an integer number (1304100).

Almost surely, 2^28526140 is an apocalyptic number.

28526140 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 28526140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31298400).

28526140 is an abundant number, since it is smaller than the sum of its proper divisors (34070660).

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

28526140 is a wasteful number, since it uses less digits than its factorization.

28526140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534 (or 532 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 28.

The square root of 28526140 is about 5340.9868002084. The cubic root of 28526140 is about 305.5490959638.

The spelling of 28526140 in words is "twenty-eight million, five hundred twenty-six thousand, one hundred forty".