28434988 has 12 divisors (see below), whose sum is σ = 49799232. Its totient is φ = 14206640.

The previous prime is 28434983. The next prime is 28435007. The reversal of 28434988 is 88943482.

It is not an unprimeable number, because it can be changed into a prime (28434983) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7218 + ... + 10438.

It is an arithmetic number, because the mean of its divisors is an integer number (4149936).

Almost surely, 2^28434988 is an apocalyptic number.

It is an amenable number.

28434988 is a deficient number, since it is larger than the sum of its proper divisors (21364244).

28434988 is a wasteful number, since it uses less digits than its factorization.

28434988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5432 (or 5430 counting only the distinct ones).

The product of its digits is 442368, while the sum is 46.

The square root of 28434988 is about 5332.4467179710. The cubic root of 28434988 is about 305.2232997024.

The spelling of 28434988 in words is "twenty-eight million, four hundred thirty-four thousand, nine hundred eighty-eight".