28878519 has 8 divisors (see below), whose sum is σ = 39832560. Its totient is φ = 18588416.

The previous prime is 28878517. The next prime is 28878533. The reversal of 28878519 is 91587882.

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 28878519 - 2¹ = 28878517 is a prime.

It is a super-2 number, since 2×28878519² = 1667937719266722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28878517) 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, 165882 + ... + 166055.

It is an arithmetic number, because the mean of its divisors is an integer number (4979070).

Almost surely, 2^28878519 is an apocalyptic number.

28878519 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

28878519 is a deficient number, since it is larger than the sum of its proper divisors (10954041).

28878519 is a wasteful number, since it uses less digits than its factorization.

28878519 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331969.

The product of its digits is 322560, while the sum is 48.

The square root of 28878519 is about 5373.8737424692. The cubic root of 28878519 is about 306.8020843072.

The spelling of 28878519 in words is "twenty-eight million, eight hundred seventy-eight thousand, five hundred nineteen".