28091952 has 180 divisors, whose sum is σ = 96042960. Its totient is φ = 7499520.

The previous prime is 28091941. The next prime is 28091953. The reversal of 28091952 is 25919082.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (28091953) by changing a digit.

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 35 ways as a sum of consecutive naturals, for example, 906177 + ... + 906207.

It is an arithmetic number, because the mean of its divisors is an integer number (533572).

Almost surely, 2^28091952 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 28091952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48021480).

28091952 is an abundant number, since it is smaller than the sum of its proper divisors (67951008).

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

28091952 is a wasteful number, since it uses less digits than its factorization.

28091952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112 (or 72 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 28091952 is about 5300.1841477443. The cubic root of 28091952 is about 303.9909392498.

It can be divided in two parts, 2809 and 1952, that added together give a square (4761 = 69²).

The spelling of 28091952 in words is "twenty-eight million, ninety-one thousand, nine hundred fifty-two".