28780479 has 24 divisors (see below), whose sum is σ = 51166752. Its totient is φ = 15180480.

The previous prime is 28780463. The next prime is 28780513. The reversal of 28780479 is 97408782.

It is not a de Polignac number, because 28780479 - 2⁴ = 28780463 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28780379) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16752 + ... + 18389.

It is an arithmetic number, because the mean of its divisors is an integer number (2131948).

Almost surely, 2^28780479 is an apocalyptic number.

28780479 is a deficient number, since it is larger than the sum of its proper divisors (22386273).

28780479 is a wasteful number, since it uses less digits than its factorization.

28780479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35167 (or 35164 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 28780479 is about 5364.7440759089. The cubic root of 28780479 is about 306.4545020892.

The spelling of 28780479 in words is "twenty-eight million, seven hundred eighty thousand, four hundred seventy-nine".