28826397 has 12 divisors (see below), whose sum is σ = 42344640. Its totient is φ = 18891528.

The previous prime is 28826393. The next prime is 28826417. The reversal of 28826397 is 79362882.

28826397 is a `hidden beast` number, since 2 + 8 + 8 + 2 + 639 + 7 = 666.

It is not a de Polignac number, because 28826397 - 2² = 28826393 is a prime.

It is a super-2 number, since 2×28826397² = 1661922328003218, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28826393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 26613 + ... + 27674.

It is an arithmetic number, because the mean of its divisors is an integer number (3528720).

Almost surely, 2^28826397 is an apocalyptic number.

It is an amenable number.

28826397 is a deficient number, since it is larger than the sum of its proper divisors (13518243).

28826397 is a wasteful number, since it uses less digits than its factorization.

28826397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54352 (or 54349 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 28826397 is about 5369.0219779770. The cubic root of 28826397 is about 306.6173937587.

The spelling of 28826397 in words is "twenty-eight million, eight hundred twenty-six thousand, three hundred ninety-seven".