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13888008380 = 2254714774477
BaseRepresentation
bin11001110111100101…
…00011000010111100
31022211212201220221202
430323302203002330
5211420312232010
610214032115032
71001105060231
oct147362430274
938755656852
1013888008380
115987467284
122837095a78
13140435a14c
1495a683788
155643b06a5
hex33bca30bc

13888008380 has 24 divisors (see below), whose sum is σ = 29785347648. Its totient is φ = 5437007168.

The previous prime is 13888008353. The next prime is 13888008383. The reversal of 13888008380 is 8380088831.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13888008383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7386299 + ... + 7388178.

It is an arithmetic number, because the mean of its divisors is an integer number (1241056152).

Almost surely, 213888008380 is an apocalyptic number.

13888008380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

13888008380 is an abundant number, since it is smaller than the sum of its proper divisors (15897339268).

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

13888008380 is a wasteful number, since it uses less digits than its factorization.

13888008380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14774533 (or 14774531 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 47.

The spelling of 13888008380 in words is "thirteen billion, eight hundred eighty-eight million, eight thousand, three hundred eighty".

Divisors: 1 2 4 5 10 20 47 94 188 235 470 940 14774477 29548954 59097908 73872385 147744770 295489540 694400419 1388800838 2777601676 3472002095 6944004190 13888008380