28743564 has 24 divisors (see below), whose sum is σ = 67878720. Its totient is φ = 9465424.

The previous prime is 28743521. The next prime is 28743571. The reversal of 28743564 is 46534782.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 13434 + ... + 15425.

It is an arithmetic number, because the mean of its divisors is an integer number (2828280).

Almost surely, 2^28743564 is an apocalyptic number.

It is an amenable number.

28743564 is an abundant number, since it is smaller than the sum of its proper divisors (39135156).

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

28743564 is a wasteful number, since it uses less digits than its factorization.

28743564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28949 (or 28947 counting only the distinct ones).

The product of its digits is 161280, while the sum is 39.

The square root of 28743564 is about 5361.3024536954. The cubic root of 28743564 is about 306.3234224069.

The spelling of 28743564 in words is "twenty-eight million, seven hundred forty-three thousand, five hundred sixty-four".