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13888530 = 233551439
BaseRepresentation
bin110100111110…
…110000010010
3222010121111000
4310332300102
512023413110
61213402430
7226023225
oct64766022
928117430
1013888530
117926727
124799416
132b53786
141bb75bc
1513451c0
hexd3ec12

13888530 has 32 divisors (see below), whose sum is σ = 37036800. Its totient is φ = 3703536.

The previous prime is 13888519. The next prime is 13888531. The reversal of 13888530 is 3588831.

It is a happy number.

13888530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (13888531) 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, 25450 + ... + 25989.

It is an arithmetic number, because the mean of its divisors is an integer number (1157400).

Almost surely, 213888530 is an apocalyptic number.

13888530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13888530 is an abundant number, since it is smaller than the sum of its proper divisors (23148270).

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

13888530 is a wasteful number, since it uses less digits than its factorization.

13888530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51455 (or 51449 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 13888530 is about 3726.7318121915. The cubic root of 13888530 is about 240.3728579374.

The spelling of 13888530 in words is "thirteen million, eight hundred eighty-eight thousand, five hundred thirty".