28532686 has 32 divisors (see below), whose sum is σ = 52996608. Its totient is φ = 11219040.

The previous prime is 28532683. The next prime is 28532701. The reversal of 28532686 is 68623582.

It is a super-2 number, since 2×28532686² = 1628228340749192, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28532683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38031 + ... + 38773.

It is an arithmetic number, because the mean of its divisors is an integer number (1656144).

Almost surely, 2^28532686 is an apocalyptic number.

28532686 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

28532686 is a deficient number, since it is larger than the sum of its proper divisors (24463922).

28532686 is a wasteful number, since it uses less digits than its factorization.

28532686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 976.

The product of its digits is 138240, while the sum is 40.

The square root of 28532686 is about 5341.5995731616. The cubic root of 28532686 is about 305.5724660075.

The spelling of 28532686 in words is "twenty-eight million, five hundred thirty-two thousand, six hundred eighty-six".