28794540 has 24 divisors (see below), whose sum is σ = 80624880. Its totient is φ = 7678528.

The previous prime is 28794533. The next prime is 28794553. The reversal of 28794540 is 4549782.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 239895 + ... + 240014.

It is an arithmetic number, because the mean of its divisors is an integer number (3359370).

Almost surely, 2^28794540 is an apocalyptic number.

28794540 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28794540 is an abundant number, since it is smaller than the sum of its proper divisors (51830340).

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

28794540 is a wasteful number, since it uses less digits than its factorization.

28794540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 479921 (or 479919 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 28794540 is about 5366.0544164218. The cubic root of 28794540 is about 306.5044011336.

The spelling of 28794540 in words is "twenty-eight million, seven hundred ninety-four thousand, five hundred forty".