28972669 has 8 divisors (see below), whose sum is σ = 32342112. Its totient is φ = 25725840.

The previous prime is 28972667. The next prime is 28972673. The reversal of 28972669 is 96627982.

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

It is a cyclic number.

It is not a de Polignac number, because 28972669 - 2¹ = 28972667 is a prime.

It is a super-2 number, since 2×28972669² = 1678831097967122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28972667) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30154 + ... + 31099.

It is an arithmetic number, because the mean of its divisors is an integer number (4042764).

Almost surely, 2^28972669 is an apocalyptic number.

It is an amenable number.

28972669 is a deficient number, since it is larger than the sum of its proper divisors (3369443).

28972669 is a wasteful number, since it uses less digits than its factorization.

28972669 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61307.

The product of its digits is 653184, while the sum is 49.

The square root of 28972669 is about 5382.6265893149. The cubic root of 28972669 is about 307.1351355755.

The spelling of 28972669 in words is "twenty-eight million, nine hundred seventy-two thousand, six hundred sixty-nine".