28356532 has 6 divisors (see below), whose sum is σ = 49623938. Its totient is φ = 14178264.

The previous prime is 28356529. The next prime is 28356547. The reversal of 28356532 is 23565382.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27941796 + 414736 = 5286^2 + 644^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3544563 + ... + 3544570.

Almost surely, 2^28356532 is an apocalyptic number.

It is an amenable number.

28356532 is a deficient number, since it is larger than the sum of its proper divisors (21267406).

28356532 is a wasteful number, since it uses less digits than its factorization.

28356532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7089137 (or 7089135 counting only the distinct ones).

The product of its digits is 43200, while the sum is 34.

The square root of 28356532 is about 5325.0851636382. The cubic root of 28356532 is about 304.9423235918.

The spelling of 28356532 in words is "twenty-eight million, three hundred fifty-six thousand, five hundred thirty-two".