28669841 has 4 divisors (see below), whose sum is σ = 30178800. Its totient is φ = 27160884.

The previous prime is 28669831. The next prime is 28669843. The reversal of 28669841 is 14896682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28669841 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28669792 and 28669801.

It is not an unprimeable number, because it can be changed into a prime (28669843) 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, 754451 + ... + 754488.

It is an arithmetic number, because the mean of its divisors is an integer number (7544700).

Almost surely, 2^28669841 is an apocalyptic number.

It is an amenable number.

28669841 is a deficient number, since it is larger than the sum of its proper divisors (1508959).

28669841 is a wasteful number, since it uses less digits than its factorization.

28669841 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508958.

The product of its digits is 165888, while the sum is 44.

The square root of 28669841 is about 5354.4225645722. The cubic root of 28669841 is about 306.0613067248.

The spelling of 28669841 in words is "twenty-eight million, six hundred sixty-nine thousand, eight hundred forty-one".