28026432 has 168 divisors, whose sum is σ = 96133920. Its totient is φ = 7983360.

The previous prime is 28026377. The next prime is 28026437. The reversal of 28026432 is 23462082.

It is a tau number, because it is divible by the number of its divisors (168).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 28026396 and 28026405.

It is not an unprimeable number, because it can be changed into a prime (28026437) 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 23 ways as a sum of consecutive naturals, for example, 84507 + ... + 84837.

Almost surely, 2^28026432 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 28026432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48066960).

28026432 is an abundant number, since it is smaller than the sum of its proper divisors (68107488).

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

28026432 is a wasteful number, since it uses less digits than its factorization.

28026432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 366 (or 343 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 28026432 is about 5293.9996222138. Note that the first 3 decimals coincide. The cubic root of 28026432 is about 303.7544184695.

The spelling of 28026432 in words is "twenty-eight million, twenty-six thousand, four hundred thirty-two".