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28088699 = 137421487
BaseRepresentation
bin110101100100…
…1100101111011
31221212001110012
41223021211323
524142314244
62442012135
7460515152
oct153114573
957761405
1028088699
1114945501
1294a704b
135a86042
143a32599
1526ec89e
hex1ac997b

28088699 has 8 divisors (see below), whose sum is σ = 28419168. Its totient is φ = 27760320.

The previous prime is 28088659. The next prime is 28088729. The reversal of 28088699 is 99688082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28088699 - 224 = 11311483 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28088639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57434 + ... + 57920.

It is an arithmetic number, because the mean of its divisors is an integer number (3552396).

Almost surely, 228088699 is an apocalyptic number.

28088699 is a deficient number, since it is larger than the sum of its proper divisors (330469).

28088699 is a wasteful number, since it uses less digits than its factorization.

28088699 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1045.

The product of its (nonzero) digits is 497664, while the sum is 50.

The square root of 28088699 is about 5299.8772627298. The cubic root of 28088699 is about 303.9792049199.

The spelling of 28088699 in words is "twenty-eight million, eighty-eight thousand, six hundred ninety-nine".

Divisors: 1 137 421 487 57677 66719 205027 28088699