28301977 has 8 divisors (see below), whose sum is σ = 31871232. Its totient is φ = 24898800.

The previous prime is 28301953. The next prime is 28301989. The reversal of 28301977 is 77910382.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28301977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28301177) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 41158 + ... + 41839.

It is an arithmetic number, because the mean of its divisors is an integer number (3983904).

Almost surely, 2^28301977 is an apocalyptic number.

It is an amenable number.

28301977 is a deficient number, since it is larger than the sum of its proper divisors (3569255).

28301977 is a wasteful number, since it uses less digits than its factorization.

28301977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83039.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 28301977 is about 5319.9602442124. The cubic root of 28301977 is about 304.7466390066.

The spelling of 28301977 in words is "twenty-eight million, three hundred one thousand, nine hundred seventy-seven".