28669839 has 8 divisors (see below), whose sum is σ = 41701632. Its totient is φ = 17375640.

The previous prime is 28669831. The next prime is 28669843. The reversal of 28669839 is 93896682.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28669839 - 2³ = 28669831 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28669791 and 28669800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28669831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 434359 + ... + 434424.

It is an arithmetic number, because the mean of its divisors is an integer number (5212704).

Almost surely, 2^28669839 is an apocalyptic number.

28669839 is a deficient number, since it is larger than the sum of its proper divisors (13031793).

28669839 is a wasteful number, since it uses less digits than its factorization.

28669839 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 868797.

The product of its digits is 1119744, while the sum is 51.

The square root of 28669839 is about 5354.4223778107. The cubic root of 28669839 is about 306.0612996079.

It can be divided in two parts, 286 and 69839, that added together give a triangular number (70125 = T₃₇₄).

The spelling of 28669839 in words is "twenty-eight million, six hundred sixty-nine thousand, eight hundred thirty-nine".