28739132 has 6 divisors (see below), whose sum is σ = 50293488. Its totient is φ = 14369564.

The previous prime is 28739111. The next prime is 28739141. The reversal of 28739132 is 23193782.

It is a super-2 number, since 2×28739132² = 1651875416226848, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28739092 and 28739101.

It is a congruent number.

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 as a sum of consecutive naturals, namely, 3592388 + ... + 3592395.

It is an arithmetic number, because the mean of its divisors is an integer number (8382248).

Almost surely, 2^28739132 is an apocalyptic number.

It is an amenable number.

28739132 is a deficient number, since it is larger than the sum of its proper divisors (21554356).

28739132 is a wasteful number, since it uses less digits than its factorization.

28739132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7184787 (or 7184785 counting only the distinct ones).

The product of its digits is 18144, while the sum is 35.

The square root of 28739132 is about 5360.8891053630. The cubic root of 28739132 is about 306.3076774887.

The spelling of 28739132 in words is "twenty-eight million, seven hundred thirty-nine thousand, one hundred thirty-two".