28967961 has 8 divisors (see below), whose sum is σ = 42135264. Its totient is φ = 17556320.

The previous prime is 28967947. The next prime is 28967963. The reversal of 28967961 is 16976982.

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 28967961 - 2¹⁰ = 28966937 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28967961.

It is not an unprimeable number, because it can be changed into a prime (28967963) 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, 438876 + ... + 438941.

It is an arithmetic number, because the mean of its divisors is an integer number (5266908).

Almost surely, 2^28967961 is an apocalyptic number.

It is an amenable number.

28967961 is a deficient number, since it is larger than the sum of its proper divisors (13167303).

28967961 is a wasteful number, since it uses less digits than its factorization.

28967961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 877831.

The product of its digits is 326592, while the sum is 48.

The square root of 28967961 is about 5382.1892385906. The cubic root of 28967961 is about 307.1184983953.

The spelling of 28967961 in words is "twenty-eight million, nine hundred sixty-seven thousand, nine hundred sixty-one".