28026436 has 9 divisors (see below), whose sum is σ = 49064799. Its totient is φ = 14007924.

The previous prime is 28026377. The next prime is 28026437. The reversal of 28026436 is 63462082.

The square root of 28026436 is 5294.

It is a perfect power (a square), and thus also a powerful number.

It is a super-2 number, since 2×28026436² = 1570962229724192, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28026398 and 28026407.

It is not an unprimeable number, because it can be changed into a prime (28026437) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 9265 + ... + 11911.

Almost surely, 2^28026436 is an apocalyptic number.

28026436 is the 5294-th square number.

It is an amenable number.

28026436 is a deficient number, since it is larger than the sum of its proper divisors (21038363).

28026436 is an frugal number, since it uses more digits than its factorization.

28026436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5298 (or 2649 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 31.

The cubic root of 28026436 is about 303.7544329203.

The spelling of 28026436 in words is "twenty-eight million, twenty-six thousand, four hundred thirty-six".