28621132 has 12 divisors (see below), whose sum is σ = 53033400. Its totient is φ = 13468736.

The previous prime is 28621121. The next prime is 28621169. The reversal of 28621132 is 23112682.

It is a super-2 number, since 2×28621132² = 1638338393922848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28621097 and 28621106.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210382 + ... + 210517.

It is an arithmetic number, because the mean of its divisors is an integer number (4419450).

Almost surely, 2^28621132 is an apocalyptic number.

It is an amenable number.

28621132 is a deficient number, since it is larger than the sum of its proper divisors (24412268).

28621132 is a wasteful number, since it uses less digits than its factorization.

28621132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420920 (or 420918 counting only the distinct ones).

The product of its digits is 1152, while the sum is 25.

The square root of 28621132 is about 5349.8721480050. The cubic root of 28621132 is about 305.8878795237.

The spelling of 28621132 in words is "twenty-eight million, six hundred twenty-one thousand, one hundred thirty-two".