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13888245 = 357294561
BaseRepresentation
bin110100111110…
…101011110101
3222010121002110
4310332223311
512023410440
61213401233
7226022340
oct64765365
928117073
1013888245
117926498
124799219
132b535c7
141bb7457
151345080
hexd3eaf5

13888245 has 32 divisors (see below), whose sum is σ = 26277120. Its totient is φ = 6128640.

The previous prime is 13888181. The next prime is 13888249. The reversal of 13888245 is 54288831.

13888245 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 13888245 - 26 = 13888181 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888249) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 765 + ... + 5325.

It is an arithmetic number, because the mean of its divisors is an integer number (821160).

Almost surely, 213888245 is an apocalyptic number.

13888245 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

13888245 is a deficient number, since it is larger than the sum of its proper divisors (12388875).

13888245 is a wasteful number, since it uses less digits than its factorization.

13888245 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4605.

The product of its digits is 61440, while the sum is 39.

The square root of 13888245 is about 3726.6935747389. The cubic root of 13888245 is about 240.3712137333.

The spelling of 13888245 in words is "thirteen million, eight hundred eighty-eight thousand, two hundred forty-five".

Divisors: 1 3 5 7 15 21 29 35 87 105 145 203 435 609 1015 3045 4561 13683 22805 31927 68415 95781 132269 159635 396807 478905 661345 925883 1984035 2777649 4629415 13888245