28726057 has 8 divisors (see below), whose sum is σ = 30942720. Its totient is φ = 26590080.

The previous prime is 28726007. The next prime is 28726067. The reversal of 28726057 is 75062782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28726057 - 2¹¹ = 28724009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28726007) by changing a digit.

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, 19432 + ... + 20857.

It is an arithmetic number, because the mean of its divisors is an integer number (3867840).

Almost surely, 2^28726057 is an apocalyptic number.

It is an amenable number.

28726057 is a deficient number, since it is larger than the sum of its proper divisors (2216663).

28726057 is a wasteful number, since it uses less digits than its factorization.

28726057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40343.

The product of its (nonzero) digits is 47040, while the sum is 37.

The square root of 28726057 is about 5359.6694860784. The cubic root of 28726057 is about 306.2612184145.

The spelling of 28726057 in words is "twenty-eight million, seven hundred twenty-six thousand, fifty-seven".