28977983 has 4 divisors (see below), whose sum is σ = 30503160. Its totient is φ = 27452808.

The previous prime is 28977943. The next prime is 28978003. The reversal of 28977983 is 38977982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 38977982 = 2 ⋅19488991.

It is a cyclic number.

It is not a de Polignac number, because 28977983 - 2¹⁴ = 28961599 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977943) 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, 762560 + ... + 762597.

It is an arithmetic number, because the mean of its divisors is an integer number (7625790).

Almost surely, 2^28977983 is an apocalyptic number.

28977983 is a deficient number, since it is larger than the sum of its proper divisors (1525177).

28977983 is a wasteful number, since it uses less digits than its factorization.

28977983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1525176.

The product of its digits is 1524096, while the sum is 53.

The square root of 28977983 is about 5383.1201918590. The cubic root of 28977983 is about 307.1539120799.

Subtracting 28977983 from its reverse (38977982), we obtain a palindrome (9999999).

The spelling of 28977983 in words is "twenty-eight million, nine hundred seventy-seven thousand, nine hundred eighty-three".