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189817140 = 22353163619
BaseRepresentation
bin10110101000001…
…10000100110100
3111020011201011110
423110012010310
5342043122030
630500235020
74463263512
oct1324060464
9436151143
10189817140
1198168477
125369ba70
1330430446
141b2d14b2
15119e71b0
hexb506134

189817140 has 24 divisors (see below), whose sum is σ = 531488160. Its totient is φ = 50617888.

The previous prime is 189817127. The next prime is 189817169. The reversal of 189817140 is 41718981.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1581750 + ... + 1581869.

It is an arithmetic number, because the mean of its divisors is an integer number (22145340).

Almost surely, 2189817140 is an apocalyptic number.

189817140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189817140 is an abundant number, since it is smaller than the sum of its proper divisors (341671020).

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

189817140 is a wasteful number, since it uses less digits than its factorization.

189817140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3163631 (or 3163629 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 39.

The square root of 189817140 is about 13777.4141260252. The cubic root of 189817140 is about 574.7052200442.

The spelling of 189817140 in words is "one hundred eighty-nine million, eight hundred seventeen thousand, one hundred forty".

Divisors: 1 2 3 4 5 6 10 12 15 20 30 60 3163619 6327238 9490857 12654476 15818095 18981714 31636190 37963428 47454285 63272380 94908570 189817140