28696491 has 16 divisors (see below), whose sum is σ = 42700800. Its totient is φ = 19046664.

The previous prime is 28696489. The next prime is 28696511. The reversal of 28696491 is 19469682.

It is a happy number.

It is not a de Polignac number, because 28696491 - 2¹ = 28696489 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28696091) 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, 4230 + ... + 8676.

It is an arithmetic number, because the mean of its divisors is an integer number (2668800).

Almost surely, 2^28696491 is an apocalyptic number.

28696491 is a deficient number, since it is larger than the sum of its proper divisors (14004309).

28696491 is a wasteful number, since it uses less digits than its factorization.

28696491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4695 (or 4689 counting only the distinct ones).

The product of its digits is 186624, while the sum is 45.

The square root of 28696491 is about 5356.9105835360. The cubic root of 28696491 is about 306.1561102715.

The spelling of 28696491 in words is "twenty-eight million, six hundred ninety-six thousand, four hundred ninety-one".