28949535 has 32 divisors (see below), whose sum is σ = 52673280. Its totient is φ = 15077664.

The previous prime is 28949533. The next prime is 28949539. The reversal of 28949535 is 53594982.

28949535 is a `hidden beast` number, since 28 + 94 + 9 + 535 = 666.

It is not a de Polignac number, because 28949535 - 2¹ = 28949533 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28949533) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3312 + ... + 8298.

It is an arithmetic number, because the mean of its divisors is an integer number (1646040).

Almost surely, 2^28949535 is an apocalyptic number.

28949535 is a deficient number, since it is larger than the sum of its proper divisors (23723745).

28949535 is a wasteful number, since it uses less digits than its factorization.

28949535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5044 (or 5038 counting only the distinct ones).

The product of its digits is 388800, while the sum is 45.

The square root of 28949535 is about 5380.4772093189. The cubic root of 28949535 is about 307.0533670624.

The spelling of 28949535 in words is "twenty-eight million, nine hundred forty-nine thousand, five hundred thirty-five".