28495649 has 16 divisors (see below), whose sum is σ = 36919680. Its totient is φ = 21358080.

The previous prime is 28495639. The next prime is 28495651. The reversal of 28495649 is 94659482.

It is a cyclic number.

It is not a de Polignac number, because 28495649 - 2⁴ = 28495633 is a prime.

It is a super-3 number, since 3×28495649³ (a number of 23 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (28495619) 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 15 ways as a sum of consecutive naturals, for example, 6512 + ... + 9969.

It is an arithmetic number, because the mean of its divisors is an integer number (2307480).

Almost surely, 2^28495649 is an apocalyptic number.

It is an amenable number.

28495649 is a deficient number, since it is larger than the sum of its proper divisors (8424031).

28495649 is a wasteful number, since it uses less digits than its factorization.

28495649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16520.

The product of its digits is 622080, while the sum is 47.

The square root of 28495649 is about 5338.1316019746. The cubic root of 28495649 is about 305.4401921203.

The spelling of 28495649 in words is "twenty-eight million, four hundred ninety-five thousand, six hundred forty-nine".