28945366 has 4 divisors (see below), whose sum is σ = 43418052. Its totient is φ = 14472682.

The previous prime is 28945361. The next prime is 28945387. The reversal of 28945366 is 66354982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66354982 = 2 ⋅33177491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28945361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7236340 + ... + 7236343.

It is an arithmetic number, because the mean of its divisors is an integer number (10854513).

Almost surely, 2^28945366 is an apocalyptic number.

28945366 is a deficient number, since it is larger than the sum of its proper divisors (14472686).

28945366 is a wasteful number, since it uses less digits than its factorization.

28945366 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14472685.

The product of its digits is 311040, while the sum is 43.

The square root of 28945366 is about 5380.0897762026. The cubic root of 28945366 is about 307.0386268494.

The spelling of 28945366 in words is "twenty-eight million, nine hundred forty-five thousand, three hundred sixty-six".