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28405326 = 2329163249
BaseRepresentation
bin110110001011…
…0111001001110
31222110010210010
41230112321032
524232432301
62452454050
7463304235
oct154267116
958403703
1028405326
1115041384
12961a326
135b671b1
143ab5b1c
1527615d6
hex1b16e4e

28405326 has 16 divisors (see below), whose sum is σ = 58770000. Its totient is φ = 9141888.

The previous prime is 28405303. The next prime is 28405337. The reversal of 28405326 is 62350482.

It is a junction number, because it is equal to n+sod(n) for n = 28405293 and 28405302.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81451 + ... + 81798.

It is an arithmetic number, because the mean of its divisors is an integer number (3673125).

Almost surely, 228405326 is an apocalyptic number.

28405326 is an abundant number, since it is smaller than the sum of its proper divisors (30364674).

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

28405326 is a wasteful number, since it uses less digits than its factorization.

28405326 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163283.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 28405326 is about 5329.6647174095. The cubic root of 28405326 is about 305.1171313977.

The spelling of 28405326 in words is "twenty-eight million, four hundred five thousand, three hundred twenty-six".

Divisors: 1 2 3 6 29 58 87 174 163249 326498 489747 979494 4734221 9468442 14202663 28405326