28553535 has 12 divisors (see below), whose sum is σ = 49492872. Its totient is φ = 15228528.

The previous prime is 28553521. The next prime is 28553549. The reversal of 28553535 is 53535582.

It is an interprime number because it is at equal distance from previous prime (28553521) and next prime (28553549).

It is not a de Polignac number, because 28553535 - 2¹³ = 28545343 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28553535.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 317217 + ... + 317306.

It is an arithmetic number, because the mean of its divisors is an integer number (4124406).

Almost surely, 2^28553535 is an apocalyptic number.

28553535 is a deficient number, since it is larger than the sum of its proper divisors (20939337).

28553535 is a wasteful number, since it uses less digits than its factorization.

28553535 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 634534 (or 634531 counting only the distinct ones).

The product of its digits is 90000, while the sum is 36.

The square root of 28553535 is about 5343.5507857603. The cubic root of 28553535 is about 305.6468757473.

The spelling of 28553535 in words is "twenty-eight million, five hundred fifty-three thousand, five hundred thirty-five".