28976641 has 4 divisors (see below), whose sum is σ = 28991572. Its totient is φ = 28961712.

The previous prime is 28976639. The next prime is 28976659. The reversal of 28976641 is 14667982.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5308416 + 23668225 = 2304^2 + 4865^2 .

It is a cyclic number.

It is not a de Polignac number, because 28976641 - 2¹ = 28976639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28976621) 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, 4026 + ... + 8611.

It is an arithmetic number, because the mean of its divisors is an integer number (7247893).

Almost surely, 2^28976641 is an apocalyptic number.

It is an amenable number.

28976641 is a deficient number, since it is larger than the sum of its proper divisors (14931).

28976641 is a wasteful number, since it uses less digits than its factorization.

28976641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14930.

The product of its digits is 145152, while the sum is 43.

The square root of 28976641 is about 5382.9955415178. The cubic root of 28976641 is about 307.1491704695.

The spelling of 28976641 in words is "twenty-eight million, nine hundred seventy-six thousand, six hundred forty-one".