28541380 has 48 divisors (see below), whose sum is σ = 68866560. Its totient is φ = 9733248.

The previous prime is 28541369. The next prime is 28541407. The reversal of 28541380 is 8314582.

It is a super-2 number, since 2×28541380² = 1629220744608800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33034 + ... + 33886.

It is an arithmetic number, because the mean of its divisors is an integer number (1434720).

Almost surely, 2^28541380 is an apocalyptic number.

28541380 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 28541380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34433280).

28541380 is an abundant number, since it is smaller than the sum of its proper divisors (40325180).

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

28541380 is a wasteful number, since it uses less digits than its factorization.

28541380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1108 (or 1106 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 31.

The square root of 28541380 is about 5342.4133123524. The cubic root of 28541380 is about 305.6034991559.

The spelling of 28541380 in words is "twenty-eight million, five hundred forty-one thousand, three hundred eighty".