28983387 has 4 divisors (see below), whose sum is σ = 38644520. Its totient is φ = 19322256.

The previous prime is 28983373. The next prime is 28983391. The reversal of 28983387 is 78338982.

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

It is not a de Polignac number, because 28983387 - 2⁴ = 28983371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28983347) 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, 4830562 + ... + 4830567.

It is an arithmetic number, because the mean of its divisors is an integer number (9661130).

Almost surely, 2^28983387 is an apocalyptic number.

28983387 is a deficient number, since it is larger than the sum of its proper divisors (9661133).

28983387 is an equidigital number, since it uses as much as digits as its factorization.

28983387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9661132.

The product of its digits is 580608, while the sum is 48.

The square root of 28983387 is about 5383.6221078378. The cubic root of 28983387 is about 307.1730042365.

The spelling of 28983387 in words is "twenty-eight million, nine hundred eighty-three thousand, three hundred eighty-seven".