28779033 has 4 divisors (see below), whose sum is σ = 38372048. Its totient is φ = 19186020.

The previous prime is 28779017. The next prime is 28779043. The reversal of 28779033 is 33097782.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 28779033 - 2⁴ = 28779017 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28778982 and 28779000.

It is not an unprimeable number, because it can be changed into a prime (28779043) 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, 4796503 + ... + 4796508.

It is an arithmetic number, because the mean of its divisors is an integer number (9593012).

Almost surely, 2^28779033 is an apocalyptic number.

It is an amenable number.

28779033 is a deficient number, since it is larger than the sum of its proper divisors (9593015).

28779033 is an equidigital number, since it uses as much as digits as its factorization.

28779033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9593014.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 28779033 is about 5364.6093054387. The cubic root of 28779033 is about 306.4493696679.

The spelling of 28779033 in words is "twenty-eight million, seven hundred seventy-nine thousand, thirty-three".