28976387 has 12 divisors (see below), whose sum is σ = 33366456. Its totient is φ = 24952320.

The previous prime is 28976377. The next prime is 28976399. The reversal of 28976387 is 78367982.

It is a happy number.

It is not a de Polignac number, because 28976387 - 2⁴ = 28976371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28976327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 323 + ... + 7619.

It is an arithmetic number, because the mean of its divisors is an integer number (2780538).

Almost surely, 2^28976387 is an apocalyptic number.

28976387 is a deficient number, since it is larger than the sum of its proper divisors (4390069).

28976387 is a wasteful number, since it uses less digits than its factorization.

28976387 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7346 (or 7327 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 50.

The square root of 28976387 is about 5382.9719486544. The cubic root of 28976387 is about 307.1482730097.

The spelling of 28976387 in words is "twenty-eight million, nine hundred seventy-six thousand, three hundred eighty-seven".