28996277 has 4 divisors (see below), whose sum is σ = 29019456. Its totient is φ = 28973100.

The previous prime is 28996249. The next prime is 28996309. The reversal of 28996277 is 77269982.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28996277 - 2²⁰ = 27947701 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28996207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9599 + ... + 12252.

It is an arithmetic number, because the mean of its divisors is an integer number (7254864).

Almost surely, 2^28996277 is an apocalyptic number.

It is an amenable number.

28996277 is a deficient number, since it is larger than the sum of its proper divisors (23179).

28996277 is a wasteful number, since it uses less digits than its factorization.

28996277 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23178.

The product of its digits is 762048, while the sum is 50.

The square root of 28996277 is about 5384.8191241675. The cubic root of 28996277 is about 307.2185346088.

The spelling of 28996277 in words is "twenty-eight million, nine hundred ninety-six thousand, two hundred seventy-seven".