28426636 has 24 divisors (see below), whose sum is σ = 57012480. Its totient is φ = 12148752.

The previous prime is 28426633. The next prime is 28426637. The reversal of 28426636 is 63662482.

It is a junction number, because it is equal to n+sod(n) for n = 28426595 and 28426604.

It is not an unprimeable number, because it can be changed into a prime (28426631) 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 7 ways as a sum of consecutive naturals, for example, 10521 + ... + 12943.

It is an arithmetic number, because the mean of its divisors is an integer number (2375520).

Almost surely, 2^28426636 is an apocalyptic number.

It is an amenable number.

28426636 is an abundant number, since it is smaller than the sum of its proper divisors (28585844).

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

28426636 is a wasteful number, since it uses less digits than its factorization.

28426636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2853 (or 2851 counting only the distinct ones).

The product of its digits is 82944, while the sum is 37.

The square root of 28426636 is about 5331.6635302690. The cubic root of 28426636 is about 305.1934131107.

The spelling of 28426636 in words is "twenty-eight million, four hundred twenty-six thousand, six hundred thirty-six".