28313032 has 32 divisors (see below), whose sum is σ = 58413600. Its totient is φ = 12864720.

The previous prime is 28313017. The next prime is 28313063. The reversal of 28313032 is 23031382.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is a junction number, because it is equal to n+sod(n) for n = 28312994 and 28313012.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9319 + ... + 11977.

It is an arithmetic number, because the mean of its divisors is an integer number (1825425).

Almost surely, 2^28313032 is an apocalyptic number.

28313032 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28313032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (29206800).

28313032 is an abundant number, since it is smaller than the sum of its proper divisors (30100568).

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

28313032 is a wasteful number, since it uses less digits than its factorization.

28313032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2698 (or 2672 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 22.

The square root of 28313032 is about 5320.9991542942. Note that the first 3 decimals coincide. The cubic root of 28313032 is about 304.7863127432.

The spelling of 28313032 in words is "twenty-eight million, three hundred thirteen thousand, thirty-two".