28858491 has 16 divisors (see below), whose sum is σ = 44613120. Its totient is φ = 18402120.

The previous prime is 28858481. The next prime is 28858499. The reversal of 28858491 is 19485882.

It is a happy number.

It is not a de Polignac number, because 28858491 - 2⁷ = 28858363 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28858499) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22615 + ... + 23856.

It is an arithmetic number, because the mean of its divisors is an integer number (2788320).

Almost surely, 2^28858491 is an apocalyptic number.

28858491 is a deficient number, since it is larger than the sum of its proper divisors (15754629).

28858491 is a wasteful number, since it uses less digits than its factorization.

28858491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46503 (or 46497 counting only the distinct ones).

The product of its digits is 184320, while the sum is 45.

The square root of 28858491 is about 5372.0099590377. The cubic root of 28858491 is about 306.7311428440.

The spelling of 28858491 in words is "twenty-eight million, eight hundred fifty-eight thousand, four hundred ninety-one".