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28095774 = 237668947
BaseRepresentation
bin110101100101…
…1010100011110
31221212102011020
41223023110132
524143031044
62442105010
7460544610
oct153132436
957772136
1028095774
111494a853
1294ab166
135a89325
143a34db0
1526eea19
hex1acb51e

28095774 has 16 divisors (see below), whose sum is σ = 64219008. Its totient is φ = 8027352.

The previous prime is 28095773. The next prime is 28095779. The reversal of 28095774 is 47759082.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 668947 = 28095774 / (2 + 8 + 0 + 9 + 5 + 7 + 7 + 4).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28095773) 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, 334432 + ... + 334515.

It is an arithmetic number, because the mean of its divisors is an integer number (4013688).

Almost surely, 228095774 is an apocalyptic number.

28095774 is an abundant number, since it is smaller than the sum of its proper divisors (36123234).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

28095774 is a wasteful number, since it uses less digits than its factorization.

28095774 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 668959.

The product of its (nonzero) digits is 141120, while the sum is 42.

The square root of 28095774 is about 5300.5446889919. The cubic root of 28095774 is about 304.0047249381.

The spelling of 28095774 in words is "twenty-eight million, ninety-five thousand, seven hundred seventy-four".

Divisors: 1 2 3 6 7 14 21 42 668947 1337894 2006841 4013682 4682629 9365258 14047887 28095774