28751043 has 16 divisors (see below), whose sum is σ = 39822336. Its totient is φ = 18431520.

The previous prime is 28751033. The next prime is 28751053. The reversal of 28751043 is 34015782.

It is a Cunningham number, because it is equal to 5362²-1.

It is an interprime number because it is at equal distance from previous prime (28751033) and next prime (28751053).

It is not a de Polignac number, because 28751043 - 2⁴ = 28751027 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28751043.

It is not an unprimeable number, because it can be changed into a prime (28751003) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 15196 + ... + 16982.

It is an arithmetic number, because the mean of its divisors is an integer number (2488896).

Almost surely, 2^28751043 is an apocalyptic number.

28751043 is a deficient number, since it is larger than the sum of its proper divisors (11071293).

28751043 is a wasteful number, since it uses less digits than its factorization.

28751043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1994.

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 28751043 is about 5361.9999067512. Note that the first 4 decimals coincide. The cubic root of 28751043 is about 306.3499882868.

The spelling of 28751043 in words is "twenty-eight million, seven hundred fifty-one thousand, forty-three".