28894979 has 4 divisors (see below), whose sum is σ = 29062176. Its totient is φ = 28727784.

The previous prime is 28894967. The next prime is 28894997. The reversal of 28894979 is 97949882.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97949882 = 2 ⋅48974941.

It is a cyclic number.

It is not a de Polignac number, because 28894979 - 2¹⁶ = 28829443 is a prime.

It is a super-2 number, since 2×28894979² = 1669839622820882, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28894909) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83339 + ... + 83684.

It is an arithmetic number, because the mean of its divisors is an integer number (7265544).

Almost surely, 2^28894979 is an apocalyptic number.

28894979 is a deficient number, since it is larger than the sum of its proper divisors (167197).

28894979 is a wasteful number, since it uses less digits than its factorization.

28894979 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 167196.

The product of its digits is 2612736, while the sum is 56.

The square root of 28894979 is about 5375.4050079971. The cubic root of 28894979 is about 306.8603629556.

The spelling of 28894979 in words is "twenty-eight million, eight hundred ninety-four thousand, nine hundred seventy-nine".