28850737 has 4 divisors (see below), whose sum is σ = 29845620. Its totient is φ = 27855856.

The previous prime is 28850729. The next prime is 28850749. The reversal of 28850737 is 73705882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 73705882 = 2 ⋅36852941.

It can be written as a sum of positive squares in 2 ways, for example, as 7974976 + 20875761 = 2824^2 + 4569^2 .

It is a cyclic number.

It is not a de Polignac number, because 28850737 - 2³ = 28850729 is a prime.

It is a super-3 number, since 3×28850737³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28850737.

It is not an unprimeable number, because it can be changed into a prime (28850777) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 497398 + ... + 497455.

It is an arithmetic number, because the mean of its divisors is an integer number (7461405).

Almost surely, 2^28850737 is an apocalyptic number.

It is an amenable number.

28850737 is a deficient number, since it is larger than the sum of its proper divisors (994883).

28850737 is an equidigital number, since it uses as much as digits as its factorization.

28850737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 994882.

The product of its (nonzero) digits is 94080, while the sum is 40.

The square root of 28850737 is about 5371.2882067526. The cubic root of 28850737 is about 306.7036684769.

The spelling of 28850737 in words is "twenty-eight million, eight hundred fifty thousand, seven hundred thirty-seven".