28755340 has 24 divisors (see below), whose sum is σ = 60867072. Its totient is φ = 11410560.

The previous prime is 28755329. The next prime is 28755373. The reversal of 28755340 is 4355782.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28755296 and 28755305.

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 7 ways as a sum of consecutive naturals, for example, 3121 + ... + 8200.

It is an arithmetic number, because the mean of its divisors is an integer number (2536128).

Almost surely, 2^28755340 is an apocalyptic number.

28755340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28755340 is an abundant number, since it is smaller than the sum of its proper divisors (32111732).

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

28755340 is a wasteful number, since it uses less digits than its factorization.

28755340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11457 (or 11455 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 34.

The square root of 28755340 is about 5362.4005818290. The cubic root of 28755340 is about 306.3652494180.

The spelling of 28755340 in words is "twenty-eight million, seven hundred fifty-five thousand, three hundred forty".