28900536 has 32 divisors (see below), whose sum is σ = 82573440. Its totient is φ = 8257248.

The previous prime is 28900523. The next prime is 28900537. The reversal of 28900536 is 63500982.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 28900497 and 28900506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28900537) 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, 85846 + ... + 86181.

It is an arithmetic number, because the mean of its divisors is an integer number (2580420).

Almost surely, 2^28900536 is an apocalyptic number.

It is an amenable number.

28900536 is an abundant number, since it is smaller than the sum of its proper divisors (53672904).

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

28900536 is a wasteful number, since it uses less digits than its factorization.

28900536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172043 (or 172039 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 33.

The square root of 28900536 is about 5375.9218744323. The cubic root of 28900536 is about 306.8800331981.

The spelling of 28900536 in words is "twenty-eight million, nine hundred thousand, five hundred thirty-six".