28611156 has 48 divisors (see below), whose sum is σ = 77930496. Its totient is φ = 7999584.

The previous prime is 28611137. The next prime is 28611173. The reversal of 28611156 is 65111682.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325 + ... + 7571.

It is an arithmetic number, because the mean of its divisors is an integer number (1623552).

Almost surely, 2^28611156 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 28611156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38965248).

28611156 is an abundant number, since it is smaller than the sum of its proper divisors (49319340).

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

28611156 is a wasteful number, since it uses less digits than its factorization.

28611156 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7308 (or 7306 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 28611156 is about 5348.9397080169. The cubic root of 28611156 is about 305.8523359482.

The spelling of 28611156 in words is "twenty-eight million, six hundred eleven thousand, one hundred fifty-six".