28970566 has 4 divisors (see below), whose sum is σ = 43455852. Its totient is φ = 14485282.

The previous prime is 28970563. The next prime is 28970587. The reversal of 28970566 is 66507982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 66507982 = 2 ⋅33253991.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28970563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7242640 + ... + 7242643.

It is an arithmetic number, because the mean of its divisors is an integer number (10863963).

Almost surely, 2^28970566 is an apocalyptic number.

28970566 is a deficient number, since it is larger than the sum of its proper divisors (14485286).

28970566 is a wasteful number, since it uses less digits than its factorization.

28970566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14485285.

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 28970566 is about 5382.4312350461. The cubic root of 28970566 is about 307.1277041946.

The spelling of 28970566 in words is "twenty-eight million, nine hundred seventy thousand, five hundred sixty-six".