28989357 has 16 divisors (see below), whose sum is σ = 40746240. Its totient is φ = 18304832.

The previous prime is 28989329. The next prime is 28989377. The reversal of 28989357 is 75398982.

It is a cyclic number.

It is not a de Polignac number, because 28989357 - 2⁶ = 28989293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28989377) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1468 + ... + 7754.

It is an arithmetic number, because the mean of its divisors is an integer number (2546640).

Almost surely, 2^28989357 is an apocalyptic number.

It is an amenable number.

28989357 is a deficient number, since it is larger than the sum of its proper divisors (11756883).

28989357 is a wasteful number, since it uses less digits than its factorization.

28989357 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6372.

The product of its digits is 1088640, while the sum is 51.

The square root of 28989357 is about 5384.1765387104. The cubic root of 28989357 is about 307.1940932940.

The spelling of 28989357 in words is "twenty-eight million, nine hundred eighty-nine thousand, three hundred fifty-seven".