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28405095 = 351999667
BaseRepresentation
bin110110001011…
…0110101100111
31222110010110120
41230112311213
524232430340
62452453023
7463303455
oct154266547
958403416
1028405095
1115041194
12961a173
135b67064
143ab59d5
1527614d0
hex1b16d67

28405095 has 16 divisors (see below), whose sum is σ = 47840640. Its totient is φ = 14351904.

The previous prime is 28405093. The next prime is 28405099. The reversal of 28405095 is 59050482.

It is not a de Polignac number, because 28405095 - 21 = 28405093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28405093) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49549 + ... + 50118.

It is an arithmetic number, because the mean of its divisors is an integer number (2990040).

Almost surely, 228405095 is an apocalyptic number.

28405095 is a deficient number, since it is larger than the sum of its proper divisors (19435545).

28405095 is a wasteful number, since it uses less digits than its factorization.

28405095 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99694.

The product of its (nonzero) digits is 14400, while the sum is 33.

The square root of 28405095 is about 5329.6430462086. The cubic root of 28405095 is about 305.1163042964.

The spelling of 28405095 in words is "twenty-eight million, four hundred five thousand, ninety-five".

Divisors: 1 3 5 15 19 57 95 285 99667 299001 498335 1495005 1893673 5681019 9468365 28405095