28540460 has 48 divisors (see below), whose sum is σ = 66646272. Its totient is φ = 10195200.

The previous prime is 28540441. The next prime is 28540507. The reversal of 28540460 is 6404582.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6290 + ... + 9830.

It is an arithmetic number, because the mean of its divisors is an integer number (1388464).

Almost surely, 2^28540460 is an apocalyptic number.

28540460 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 28540460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33323136).

28540460 is an abundant number, since it is smaller than the sum of its proper divisors (38105812).

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

28540460 is a wasteful number, since it uses less digits than its factorization.

28540460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3594 (or 3592 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 29.

The square root of 28540460 is about 5342.3272082492. The cubic root of 28540460 is about 305.6002155230.

The spelling of 28540460 in words is "twenty-eight million, five hundred forty thousand, four hundred sixty".