28458236 has 18 divisors (see below), whose sum is σ = 50323392. Its totient is φ = 14081280.

The previous prime is 28458233. The next prime is 28458239. The reversal of 28458236 is 63285482.

It is an interprime number because it is at equal distance from previous prime (28458233) and next prime (28458239).

It is a self number, because there is not a number n which added to its sum of digits gives 28458236.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28458233) 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, 147356 + ... + 147548.

It is an arithmetic number, because the mean of its divisors is an integer number (2795744).

Almost surely, 2^28458236 is an apocalyptic number.

It is an amenable number.

28458236 is a deficient number, since it is larger than the sum of its proper divisors (21865156).

28458236 is a wasteful number, since it uses less digits than its factorization.

28458236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581 (or 386 counting only the distinct ones).

The product of its digits is 92160, while the sum is 38.

The square root of 28458236 is about 5334.6261349789. The cubic root of 28458236 is about 305.3064589701.

The spelling of 28458236 in words is "twenty-eight million, four hundred fifty-eight thousand, two hundred thirty-six".