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188086992 = 24379193257
BaseRepresentation
bin10110011010111…
…11101011010000
3111002220210211220
423031133223100
5341122240432
630355205040
74442466402
oct1315375320
9432823756
10188086992
11971965a5
1252ba6780
132cc75aa2
15117a472c

188086992 has 80 divisors (see below), whose sum is σ = 496515840. Its totient is φ = 61341696.

The previous prime is 188086991. The next prime is 188086999. The reversal of 188086992 is 299680881.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188086991) 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, 731728 + ... + 731984.

It is an arithmetic number, because the mean of its divisors is an integer number (6206448).

Almost surely, 2188086992 is an apocalyptic number.

188086992 is a gapful number since it is divisible by the number (12) 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 188086992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248257920).

188086992 is an abundant number, since it is smaller than the sum of its proper divisors (308428848).

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

188086992 is a wasteful number, since it uses less digits than its factorization.

188086992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 540 (or 534 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 51.

The square root of 188086992 is about 13714.4811057510. The cubic root of 188086992 is about 572.9537773873.

The spelling of 188086992 in words is "one hundred eighty-eight million, eighty-six thousand, nine hundred ninety-two".