28701845 has 8 divisors (see below), whose sum is σ = 35282520. Its totient is φ = 22401280.

The previous prime is 28701839. The next prime is 28701853. The reversal of 28701845 is 54810782.

It can be written as a sum of positive squares in 4 ways, for example, as 68644 + 28633201 = 262^2 + 5351^2 .

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

It is not a de Polignac number, because 28701845 - 2¹⁰ = 28700821 is a prime.

It is a super-3 number, since 3×28701845³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

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, 69800 + ... + 70209.

It is an arithmetic number, because the mean of its divisors is an integer number (4410315).

Almost surely, 2^28701845 is an apocalyptic number.

It is an amenable number.

28701845 is a deficient number, since it is larger than the sum of its proper divisors (6580675).

28701845 is a wasteful number, since it uses less digits than its factorization.

28701845 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 140055.

The product of its (nonzero) digits is 17920, while the sum is 35.

The square root of 28701845 is about 5357.4102885629. The cubic root of 28701845 is about 306.1751492763.

The spelling of 28701845 in words is "twenty-eight million, seven hundred one thousand, eight hundred forty-five".