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28679123 = 113122713
BaseRepresentation
bin110110101100…
…1101111010011
31222222001100202
41231121233103
524320212443
62502405415
7465524414
oct155315723
958861322
1028679123
1115209060
12973086b
135c319c5
143b4780b
1527b77b8
hex1b59bd3

28679123 has 12 divisors (see below), whose sum is σ = 32340024. Its totient is φ = 25221600.

The previous prime is 28679111. The next prime is 28679197. The reversal of 28679123 is 32197682.

It is not a de Polignac number, because 28679123 - 212 = 28675027 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28679023) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9215 + ... + 11927.

It is an arithmetic number, because the mean of its divisors is an integer number (2695002).

Almost surely, 228679123 is an apocalyptic number.

28679123 is a deficient number, since it is larger than the sum of its proper divisors (3660901).

28679123 is a wasteful number, since it uses less digits than its factorization.

28679123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2786 (or 2755 counting only the distinct ones).

The product of its digits is 36288, while the sum is 38.

The square root of 28679123 is about 5355.2892545595. The cubic root of 28679123 is about 306.0943327715.

The spelling of 28679123 in words is "twenty-eight million, six hundred seventy-nine thousand, one hundred twenty-three".

Divisors: 1 11 31 341 961 2713 10571 29843 84103 925133 2607193 28679123