28910977 has 8 divisors (see below), whose sum is σ = 30248064. Its totient is φ = 27580608.

The previous prime is 28910971. The next prime is 28911019. The reversal of 28910977 is 77901982.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 28910977 - 2¹⁵ = 28878209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28910971) 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 7 ways as a sum of consecutive naturals, for example, 8508 + ... + 11410.

It is an arithmetic number, because the mean of its divisors is an integer number (3781008).

Almost surely, 2^28910977 is an apocalyptic number.

It is an amenable number.

28910977 is a deficient number, since it is larger than the sum of its proper divisors (1337087).

28910977 is a wasteful number, since it uses less digits than its factorization.

28910977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3359.

The product of its (nonzero) digits is 63504, while the sum is 43.

The square root of 28910977 is about 5376.8928760019. The cubic root of 28910977 is about 306.9169846310.

The spelling of 28910977 in words is "twenty-eight million, nine hundred ten thousand, nine hundred seventy-seven".