28758394 has 12 divisors (see below), whose sum is σ = 50180634. Its totient is φ = 12324984.

The previous prime is 28758391. The next prime is 28758397. The reversal of 28758394 is 49385782.

It is an interprime number because it is at equal distance from previous prime (28758391) and next prime (28758397).

It can be written as a sum of positive squares in only one way, i.e., 28676025 + 82369 = 5355^2 + 287^2 .

It is not an unprimeable number, because it can be changed into a prime (28758391) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 146629 + ... + 146824.

Almost surely, 2^28758394 is an apocalyptic number.

28758394 is a deficient number, since it is larger than the sum of its proper divisors (21422240).

28758394 is a wasteful number, since it uses less digits than its factorization.

28758394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 293469 (or 293462 counting only the distinct ones).

The product of its digits is 483840, while the sum is 46.

The square root of 28758394 is about 5362.6853347926. The cubic root of 28758394 is about 306.3760950134.

The spelling of 28758394 in words is "twenty-eight million, seven hundred fifty-eight thousand, three hundred ninety-four".