28298277 has 48 divisors (see below), whose sum is σ = 50319360. Its totient is φ = 14963616.

The previous prime is 28298261. The next prime is 28298279. The reversal of 28298277 is 77289282.

It is a happy number.

It is not a de Polignac number, because 28298277 - 2⁴ = 28298261 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28298279) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 56008 + ... + 56510.

It is an arithmetic number, because the mean of its divisors is an integer number (1048320).

Almost surely, 2^28298277 is an apocalyptic number.

It is an amenable number.

28298277 is a deficient number, since it is larger than the sum of its proper divisors (22021083).

28298277 is a wasteful number, since it uses less digits than its factorization.

28298277 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 582 (or 579 counting only the distinct ones).

The product of its digits is 225792, while the sum is 45.

The square root of 28298277 is about 5319.6124858865. The cubic root of 28298277 is about 304.7333582889.

The spelling of 28298277 in words is "twenty-eight million, two hundred ninety-eight thousand, two hundred seventy-seven".