28984560 has 80 divisors (see below), whose sum is σ = 98029440. Its totient is φ = 7025920.

The previous prime is 28984489. The next prime is 28984567. The reversal of 28984560 is 6548982.

It is a tau number, because it is divible by the number of its divisors (80).

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, 2850 + ... + 8129.

It is an arithmetic number, because the mean of its divisors is an integer number (1225368).

Almost surely, 2^28984560 is an apocalyptic number.

28984560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28984560 is an abundant number, since it is smaller than the sum of its proper divisors (69044880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28984560 is a wasteful number, since it uses less digits than its factorization.

28984560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11006 (or 11000 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 42.

The square root of 28984560 is about 5383.7310482601. The cubic root of 28984560 is about 307.1771480940.

The spelling of 28984560 in words is "twenty-eight million, nine hundred eighty-four thousand, five hundred sixty".