28651532 has 24 divisors (see below), whose sum is σ = 61711776. Its totient is φ = 11334528.

The previous prime is 28651531. The next prime is 28651541. The reversal of 28651532 is 23515682.

It is not an unprimeable number, because it can be changed into a prime (28651531) 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, 38993 + ... + 39720.

It is an arithmetic number, because the mean of its divisors is an integer number (2571324).

Almost surely, 2^28651532 is an apocalyptic number.

It is an amenable number.

28651532 is an abundant number, since it is smaller than the sum of its proper divisors (33060244).

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

28651532 is a wasteful number, since it uses less digits than its factorization.

28651532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78737 (or 78735 counting only the distinct ones).

The product of its digits is 14400, while the sum is 32.

The square root of 28651532 is about 5352.7125833544. The cubic root of 28651532 is about 305.9961410367.

The spelling of 28651532 in words is "twenty-eight million, six hundred fifty-one thousand, five hundred thirty-two".