28819977 has 8 divisors (see below), whose sum is σ = 39244416. Its totient is φ = 18804432.

The previous prime is 28819957. The next prime is 28819991. The reversal of 28819977 is 77991882.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28819977 - 2¹² = 28815881 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28819937) 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, 102058 + ... + 102339.

It is an arithmetic number, because the mean of its divisors is an integer number (4905552).

Almost surely, 2^28819977 is an apocalyptic number.

It is an amenable number.

28819977 is a deficient number, since it is larger than the sum of its proper divisors (10424439).

28819977 is a wasteful number, since it uses less digits than its factorization.

28819977 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 204447.

The product of its digits is 508032, while the sum is 51.

The square root of 28819977 is about 5368.4240704326. The cubic root of 28819977 is about 306.5946295561.

The spelling of 28819977 in words is "twenty-eight million, eight hundred nineteen thousand, nine hundred seventy-seven".