28291832 has 8 divisors (see below), whose sum is σ = 53047200. Its totient is φ = 14145912.

The previous prime is 28291831. The next prime is 28291841. The reversal of 28291832 is 23819282.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 28291792 and 28291801.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28291831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1768232 + ... + 1768247.

It is an arithmetic number, because the mean of its divisors is an integer number (6630900).

Almost surely, 2^28291832 is an apocalyptic number.

It is an amenable number.

28291832 is a deficient number, since it is larger than the sum of its proper divisors (24755368).

28291832 is a wasteful number, since it uses less digits than its factorization.

28291832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3536485 (or 3536481 counting only the distinct ones).

The product of its digits is 13824, while the sum is 35.

The square root of 28291832 is about 5319.0066741827. The cubic root of 28291832 is about 304.7102219496.

The spelling of 28291832 in words is "twenty-eight million, two hundred ninety-one thousand, eight hundred thirty-two".