28996279 has 4 divisors (see below), whose sum is σ = 31226776. Its totient is φ = 26765784.

The previous prime is 28996249. The next prime is 28996309. The reversal of 28996279 is 97269982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97269982 = 2 ⋅48634991.

It is an interprime number because it is at equal distance from previous prime (28996249) and next prime (28996309).

It is a cyclic number.

It is not a de Polignac number, because 28996279 - 2²¹ = 26899127 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28996229) 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, 1115229 + ... + 1115254.

It is an arithmetic number, because the mean of its divisors is an integer number (7806694).

Almost surely, 2^28996279 is an apocalyptic number.

28996279 is a deficient number, since it is larger than the sum of its proper divisors (2230497).

28996279 is a wasteful number, since it uses less digits than its factorization.

28996279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2230496.

The product of its digits is 979776, while the sum is 52.

The square root of 28996279 is about 5384.8193098748. The cubic root of 28996279 is about 307.2185416722.

The spelling of 28996279 in words is "twenty-eight million, nine hundred ninety-six thousand, two hundred seventy-nine".