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12890188800 = 2103352171097
BaseRepresentation
bin11000000000101000…
…01010110000000000
31020021100011102211000
430000110022300000
5202344342020200
65531025252000
7634300540236
oct140024126000
936240142730
1012890188800
1155151a26a5
1225b8a94000
1312a5704568
148a3d42956
155069b0300
hex30050ac00

12890188800 has 528 divisors, whose sum is σ = 50166565920. Its totient is φ = 3232235520.

The previous prime is 12890188763. The next prime is 12890188807. The reversal of 12890188800 is 888109821.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (12890188807) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 11749852 + ... + 11750948.

Almost surely, 212890188800 is an apocalyptic number.

12890188800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12890188800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (25083282960).

12890188800 is an abundant number, since it is smaller than the sum of its proper divisors (37276377120).

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

12890188800 is a wasteful number, since it uses less digits than its factorization.

12890188800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1124 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 45.

The spelling of 12890188800 in words is "twelve billion, eight hundred ninety million, one hundred eighty-eight thousand, eight hundred".