28551357 has 12 divisors (see below), whose sum is σ = 43411680. Its totient is φ = 18032328.

The previous prime is 28551353. The next prime is 28551377. The reversal of 28551357 is 75315582.

It is not a de Polignac number, because 28551357 - 2² = 28551353 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28551353) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83313 + ... + 83654.

It is an arithmetic number, because the mean of its divisors is an integer number (3617640).

Almost surely, 2^28551357 is an apocalyptic number.

It is an amenable number.

28551357 is a deficient number, since it is larger than the sum of its proper divisors (14860323).

28551357 is a wasteful number, since it uses less digits than its factorization.

28551357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166992 (or 166989 counting only the distinct ones).

The product of its digits is 42000, while the sum is 36.

The square root of 28551357 is about 5343.3469848027. The cubic root of 28551357 is about 305.6391041956.

The spelling of 28551357 in words is "twenty-eight million, five hundred fifty-one thousand, three hundred fifty-seven".