28539678 has 8 divisors (see below), whose sum is σ = 57079368. Its totient is φ = 9513224.

The previous prime is 28539677. The next prime is 28539689. The reversal of 28539678 is 87693582.

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

28539678 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539677) 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, 2378301 + ... + 2378312.

It is an arithmetic number, because the mean of its divisors is an integer number (7134921).

Almost surely, 2^28539678 is an apocalyptic number.

28539678 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

28539678 is a wasteful number, since it uses less digits than its factorization.

28539678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4756618.

The product of its digits is 725760, while the sum is 48.

The square root of 28539678 is about 5342.2540186704. The cubic root of 28539678 is about 305.5974243796.

The spelling of 28539678 in words is "twenty-eight million, five hundred thirty-nine thousand, six hundred seventy-eight".