28957563 has 12 divisors (see below), whose sum is σ = 42417648. Its totient is φ = 19032720.

The previous prime is 28957561. The next prime is 28957637. The reversal of 28957563 is 36575982.

It is a happy number.

28957563 is a `hidden beast` number, since 2 + 89 + 5 + 7 + 563 = 666.

It is not a de Polignac number, because 28957563 - 2¹ = 28957561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28957561) 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, 22020 + ... + 23297.

It is an arithmetic number, because the mean of its divisors is an integer number (3534804).

Almost surely, 2^28957563 is an apocalyptic number.

28957563 is a deficient number, since it is larger than the sum of its proper divisors (13460085).

28957563 is a wasteful number, since it uses less digits than its factorization.

28957563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45394 (or 45391 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The square root of 28957563 is about 5381.2231880865. The cubic root of 28957563 is about 307.0817474447.

The spelling of 28957563 in words is "twenty-eight million, nine hundred fifty-seven thousand, five hundred sixty-three".