28834457 has 4 divisors (see below), whose sum is σ = 30352080. Its totient is φ = 27316836.

The previous prime is 28834441. The next prime is 28834459. The reversal of 28834457 is 75443882.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 75443882 = 2 ⋅37721941.

It is a cyclic number.

It is not a de Polignac number, because 28834457 - 2⁴ = 28834441 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28834459) 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 3 ways as a sum of consecutive naturals, for example, 758783 + ... + 758820.

It is an arithmetic number, because the mean of its divisors is an integer number (7588020).

Almost surely, 2^28834457 is an apocalyptic number.

It is an amenable number.

28834457 is a deficient number, since it is larger than the sum of its proper divisors (1517623).

28834457 is a wasteful number, since it uses less digits than its factorization.

28834457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1517622.

The product of its digits is 215040, while the sum is 41.

The square root of 28834457 is about 5369.7725277706. The cubic root of 28834457 is about 306.6459683310.

The spelling of 28834457 in words is "twenty-eight million, eight hundred thirty-four thousand, four hundred fifty-seven".