28984557 has 16 divisors (see below), whose sum is σ = 46492160. Its totient is φ = 15690672.

The previous prime is 28984489. The next prime is 28984567. The reversal of 28984557 is 75548982.

It is not a de Polignac number, because 28984557 - 2²⁴ = 12207341 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28984567) 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, 35923 + ... + 36720.

It is an arithmetic number, because the mean of its divisors is an integer number (2905760).

Almost surely, 2^28984557 is an apocalyptic number.

It is an amenable number.

28984557 is a deficient number, since it is larger than the sum of its proper divisors (17507603).

28984557 is a wasteful number, since it uses less digits than its factorization.

28984557 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72672.

The product of its digits is 806400, while the sum is 48.

The square root of 28984557 is about 5383.7307696429. The cubic root of 28984557 is about 307.1771374960.

The spelling of 28984557 in words is "twenty-eight million, nine hundred eighty-four thousand, five hundred fifty-seven".