28615132 has 48 divisors (see below), whose sum is σ = 62218240. Its totient is φ = 11212992.

The previous prime is 28615127. The next prime is 28615157. The reversal of 28615132 is 23151682.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a self number, because there is not a number n which added to its sum of digits gives 28615132.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45919 + ... + 46537.

Almost surely, 2^28615132 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28615132, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31109120).

28615132 is an abundant number, since it is smaller than the sum of its proper divisors (33603108).

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

28615132 is a wasteful number, since it uses less digits than its factorization.

28615132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770 (or 768 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

The square root of 28615132 is about 5349.3113575487. The cubic root of 28615132 is about 305.8665030626.

The spelling of 28615132 in words is "twenty-eight million, six hundred fifteen thousand, one hundred thirty-two".