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13219428 = 2231101619
BaseRepresentation
bin110010011011…
…011001100100
3220212121122110
4302123121210
511341010203
61151201020
7220235415
oct62333144
926777573
1013219428
117509a52
124516170
13297b061
141a8180c
151261d03
hexc9b664

13219428 has 12 divisors (see below), whose sum is σ = 30845360. Its totient is φ = 4406472.

The previous prime is 13219403. The next prime is 13219433. The reversal of 13219428 is 82491231.

13219428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a junction number, because it is equal to n+sod(n) for n = 13219395 and 13219404.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 550798 + ... + 550821.

Almost surely, 213219428 is an apocalyptic number.

It is an amenable number.

13219428 is an abundant number, since it is smaller than the sum of its proper divisors (17625932).

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

13219428 is a wasteful number, since it uses less digits than its factorization.

13219428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1101626 (or 1101624 counting only the distinct ones).

The product of its digits is 3456, while the sum is 30.

The square root of 13219428 is about 3635.8531323473. The cubic root of 13219428 is about 236.4490397317.

The spelling of 13219428 in words is "thirteen million, two hundred nineteen thousand, four hundred twenty-eight".

Divisors: 1 2 3 4 6 12 1101619 2203238 3304857 4406476 6609714 13219428