28242556 has 6 divisors (see below), whose sum is σ = 49424480. Its totient is φ = 14121276.

The previous prime is 28242553. The next prime is 28242601. The reversal of 28242556 is 65524282.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28242553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3530316 + ... + 3530323.

Almost surely, 2^28242556 is an apocalyptic number.

It is an amenable number.

28242556 is a deficient number, since it is larger than the sum of its proper divisors (21181924).

28242556 is a wasteful number, since it uses less digits than its factorization.

28242556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7060643 (or 7060641 counting only the distinct ones).

The product of its digits is 38400, while the sum is 34.

The square root of 28242556 is about 5314.3725876156. The cubic root of 28242556 is about 304.5332141296.

The spelling of 28242556 in words is "twenty-eight million, two hundred forty-two thousand, five hundred fifty-six".