28691083 has 4 divisors (see below), whose sum is σ = 30201160. Its totient is φ = 27181008.

The previous prime is 28691081. The next prime is 28691093. The reversal of 28691083 is 38019682.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28691083 - 2¹ = 28691081 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28691081) 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, 755010 + ... + 755047.

It is an arithmetic number, because the mean of its divisors is an integer number (7550290).

Almost surely, 2^28691083 is an apocalyptic number.

28691083 is a deficient number, since it is larger than the sum of its proper divisors (1510077).

28691083 is a wasteful number, since it uses less digits than its factorization.

28691083 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1510076.

The product of its (nonzero) digits is 20736, while the sum is 37.

The square root of 28691083 is about 5356.4057911999. The cubic root of 28691083 is about 306.1368768368.

The spelling of 28691083 in words is "twenty-eight million, six hundred ninety-one thousand, eighty-three".