28578798 has 16 divisors (see below), whose sum is σ = 63508560. Its totient is φ = 9526248.

The previous prime is 28578791. The next prime is 28578821. The reversal of 28578798 is 89787582.

It is a Harshad number since it is a multiple of its sum of digits (54), and also a Moran number because the ratio is a prime number: 529237 = 28578798 / (2 + 8 + 5 + 7 + 8 + 7 + 9 + 8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28578791) 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, 264565 + ... + 264672.

It is an arithmetic number, because the mean of its divisors is an integer number (3969285).

Almost surely, 2^28578798 is an apocalyptic number.

28578798 is an abundant number, since it is smaller than the sum of its proper divisors (34929762).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28578798 is a wasteful number, since it uses less digits than its factorization.

28578798 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529248 (or 529242 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 54.

The square root of 28578798 is about 5345.9141407247. The cubic root of 28578798 is about 305.7369904611.

The spelling of 28578798 in words is "twenty-eight million, five hundred seventy-eight thousand, seven hundred ninety-eight".