28577536 has 72 divisors (see below), whose sum is σ = 63641984. Its totient is φ = 12718080.

The previous prime is 28577531. The next prime is 28577537. The reversal of 28577536 is 63577582.

It is a junction number, because it is equal to n+sod(n) for n = 28577492 and 28577501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28577531) 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, 103030 + ... + 103306.

Almost surely, 2^28577536 is an apocalyptic number.

28577536 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28577536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31820992).

28577536 is an abundant number, since it is smaller than the sum of its proper divisors (35064448).

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

28577536 is a wasteful number, since it uses less digits than its factorization.

28577536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 337 (or 323 counting only the distinct ones).

The product of its digits is 352800, while the sum is 43.

The square root of 28577536 is about 5345.7961053523. The cubic root of 28577536 is about 305.7324900880.

The spelling of 28577536 in words is "twenty-eight million, five hundred seventy-seven thousand, five hundred thirty-six".