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28233087 = 39411029
BaseRepresentation
bin110101110110…
…0110101111111
31222010101111220
41223230311333
524211424322
62445044423
7461656131
oct153546577
958111456
1028233087
1114a33a33
129556713
135b0698c
143a6d051
15272a55c
hex1aecd7f

28233087 has 4 divisors (see below), whose sum is σ = 37644120. Its totient is φ = 18822056.

The previous prime is 28233077. The next prime is 28233091. The reversal of 28233087 is 78033282.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28233087 - 27 = 28232959 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28233017) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4705512 + ... + 4705517.

It is an arithmetic number, because the mean of its divisors is an integer number (9411030).

Almost surely, 228233087 is an apocalyptic number.

28233087 is a deficient number, since it is larger than the sum of its proper divisors (9411033).

28233087 is an equidigital number, since it uses as much as digits as its factorization.

28233087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9411032.

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 28233087 is about 5313.4816269561. The cubic root of 28233087 is about 304.4991762834.

The spelling of 28233087 in words is "twenty-eight million, two hundred thirty-three thousand, eighty-seven".

Divisors: 1 3 9411029 28233087