28897335 has 12 divisors (see below), whose sum is σ = 50088792. Its totient is φ = 15411888.

The previous prime is 28897313. The next prime is 28897343. The reversal of 28897335 is 53379882.

It is not a de Polignac number, because 28897335 - 2⁵ = 28897303 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 642163 = 28897335 / (2 + 8 + 8 + 9 + 7 + 3 + 3 + 5).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 321037 + ... + 321126.

It is an arithmetic number, because the mean of its divisors is an integer number (4174066).

Almost surely, 2^28897335 is an apocalyptic number.

28897335 is a deficient number, since it is larger than the sum of its proper divisors (21191457).

28897335 is a wasteful number, since it uses less digits than its factorization.

28897335 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 642174 (or 642171 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The square root of 28897335 is about 5375.6241498081. The cubic root of 28897335 is about 306.8687028517.

The spelling of 28897335 in words is "twenty-eight million, eight hundred ninety-seven thousand, three hundred thirty-five".