28546540 has 24 divisors (see below), whose sum is σ = 65398032. Its totient is φ = 10380480.

The previous prime is 28546517. The next prime is 28546541. The reversal of 28546540 is 4564582.

It is a junction number, because it is equal to n+sod(n) for n = 28546496 and 28546505.

It is not an unprimeable number, because it can be changed into a prime (28546541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64659 + ... + 65098.

It is an arithmetic number, because the mean of its divisors is an integer number (2724918).

Almost surely, 2^28546540 is an apocalyptic number.

28546540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28546540 is an abundant number, since it is smaller than the sum of its proper divisors (36851492).

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

28546540 is a wasteful number, since it uses less digits than its factorization.

28546540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129777 (or 129775 counting only the distinct ones).

The product of its (nonzero) digits is 38400, while the sum is 34.

The square root of 28546540 is about 5342.8962183445. The cubic root of 28546540 is about 305.6219147456.

The spelling of 28546540 in words is "twenty-eight million, five hundred forty-six thousand, five hundred forty".