28243750 has 24 divisors (see below), whose sum is σ = 52965360. Its totient is φ = 11295000.

The previous prime is 28243723. The next prime is 28243777. The reversal of 28243750 is 5734282.

It is an interprime number because it is at equal distance from previous prime (28243723) and next prime (28243777).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3991 + ... + 8509.

It is an arithmetic number, because the mean of its divisors is an integer number (2206890).

Almost surely, 2^28243750 is an apocalyptic number.

28243750 is a deficient number, since it is larger than the sum of its proper divisors (24721610).

28243750 is an frugal number, since it uses more digits than its factorization.

28243750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4546 (or 4526 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 31.

The square root of 28243750 is about 5314.4849233016. The cubic root of 28243750 is about 304.5375056148.

The spelling of 28243750 in words is "twenty-eight million, two hundred forty-three thousand, seven hundred fifty".