28943493 has 16 divisors (see below), whose sum is σ = 39626496. Its totient is φ = 18782720.

The previous prime is 28943483. The next prime is 28943501. The reversal of 28943493 is 39434982.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 28943493 - 2⁴ = 28943477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28943443) 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, 32413 + ... + 33293.

It is an arithmetic number, because the mean of its divisors is an integer number (2476656).

Almost surely, 2^28943493 is an apocalyptic number.

It is an amenable number.

28943493 is a deficient number, since it is larger than the sum of its proper divisors (10683003).

28943493 is a wasteful number, since it uses less digits than its factorization.

28943493 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1164.

The product of its digits is 186624, while the sum is 42.

The square root of 28943493 is about 5379.9157056593. The cubic root of 28943493 is about 307.0320040765.

The spelling of 28943493 in words is "twenty-eight million, nine hundred forty-three thousand, four hundred ninety-three".