28693777 has 8 divisors (see below), whose sum is σ = 32890176. Its totient is φ = 24521712.

The previous prime is 28693757. The next prime is 28693787. The reversal of 28693777 is 77739682.

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-28693777 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28693777.

It is not an unprimeable number, because it can be changed into a prime (28693747) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3478 + ... + 8335.

It is an arithmetic number, because the mean of its divisors is an integer number (4111272).

Almost surely, 2^28693777 is an apocalyptic number.

It is an amenable number.

28693777 is a deficient number, since it is larger than the sum of its proper divisors (4196399).

28693777 is a wasteful number, since it uses less digits than its factorization.

28693777 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12167.

The product of its digits is 889056, while the sum is 49.

The square root of 28693777 is about 5356.6572598963. The cubic root of 28693777 is about 306.1464582914.

The spelling of 28693777 in words is "twenty-eight million, six hundred ninety-three thousand, seven hundred seventy-seven".