28212536 has 64 divisors (see below), whose sum is σ = 61585920. Its totient is φ = 11989120.

The previous prime is 28212523. The next prime is 28212557. The reversal of 28212536 is 63521282.

It is a junction number, because it is equal to n+sod(n) for n = 28212499 and 28212508.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107141 + ... + 107403.

It is an arithmetic number, because the mean of its divisors is an integer number (962280).

Almost surely, 2^28212536 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 28212536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30792960).

28212536 is an abundant number, since it is smaller than the sum of its proper divisors (33373384).

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

28212536 is a wasteful number, since it uses less digits than its factorization.

28212536 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 356 (or 352 counting only the distinct ones).

The product of its digits is 5760, while the sum is 29.

The square root of 28212536 is about 5311.5474204793. The cubic root of 28212536 is about 304.4252762108.

The spelling of 28212536 in words is "twenty-eight million, two hundred twelve thousand, five hundred thirty-six".