28809977 has 8 divisors (see below), whose sum is σ = 32966400. Its totient is φ = 24663744.

The previous prime is 28809967. The next prime is 28809983. The reversal of 28809977 is 77990882.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28809977 - 2⁸ = 28809721 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28809967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5024 + ... + 9102.

It is an arithmetic number, because the mean of its divisors is an integer number (4120800).

Almost surely, 2^28809977 is an apocalyptic number.

It is an amenable number.

28809977 is a deficient number, since it is larger than the sum of its proper divisors (4156423).

28809977 is a wasteful number, since it uses less digits than its factorization.

28809977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5095.

The product of its (nonzero) digits is 508032, while the sum is 50.

The square root of 28809977 is about 5367.4926176009. The cubic root of 28809977 is about 306.5591645617.

The spelling of 28809977 in words is "twenty-eight million, eight hundred nine thousand, nine hundred seventy-seven".