28242532 has 18 divisors (see below), whose sum is σ = 50263094. Its totient is φ = 13883040.

The previous prime is 28242527. The next prime is 28242553. The reversal of 28242532 is 23524282.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 24760576 + 3481956 = 4976^2 + 1866^2 .

It is a super-2 number, since 2×28242532² = 1595281227542048, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28242532.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 90657 + ... + 90967.

Almost surely, 2^28242532 is an apocalyptic number.

It is an amenable number.

28242532 is a deficient number, since it is larger than the sum of its proper divisors (22020562).

28242532 is an equidigital number, since it uses as much as digits as its factorization.

28242532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 699 (or 386 counting only the distinct ones).

The product of its digits is 7680, while the sum is 28.

The square root of 28242532 is about 5314.3703295875. The cubic root of 28242532 is about 304.5331278674.

It can be divided in two parts, 2824 and 2532, that added together give a triangular number (5356 = T₁₀₃).

The spelling of 28242532 in words is "twenty-eight million, two hundred forty-two thousand, five hundred thirty-two".