28913563 has 8 divisors (see below), whose sum is σ = 33078240. Its totient is φ = 24757440.

The previous prime is 28913561. The next prime is 28913579. The reversal of 28913563 is 36531982.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28913563 - 2¹ = 28913561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28913561) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8973 + ... + 11761.

It is an arithmetic number, because the mean of its divisors is an integer number (4134780).

Almost surely, 2^28913563 is an apocalyptic number.

28913563 is a deficient number, since it is larger than the sum of its proper divisors (4164677).

28913563 is a wasteful number, since it uses less digits than its factorization.

28913563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4277.

The product of its digits is 38880, while the sum is 37.

The square root of 28913563 is about 5377.1333440784. The cubic root of 28913563 is about 306.9261352921.

The spelling of 28913563 in words is "twenty-eight million, nine hundred thirteen thousand, five hundred sixty-three".