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12016890 = 233544507
BaseRepresentation
bin101101110101…
…110011111010
3211121112002000
4231311303322
511034020030
61105321430
7204066444
oct55656372
924545060
1012016890
116868516
124036276
1326498b2
14184b494
1510c5860
hexb75cfa

12016890 has 32 divisors (see below), whose sum is σ = 32045760. Its totient is φ = 3204432.

The previous prime is 12016883. The next prime is 12016891. The reversal of 12016890 is 9861021.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (12016891) 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, 21984 + ... + 22523.

It is an arithmetic number, because the mean of its divisors is an integer number (1001430).

Almost surely, 212016890 is an apocalyptic number.

12016890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

12016890 is an abundant number, since it is smaller than the sum of its proper divisors (20028870).

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

12016890 is a wasteful number, since it uses less digits than its factorization.

12016890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44523 (or 44517 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 12016890 is about 3466.5386194301. The cubic root of 12016890 is about 229.0502105088.

The spelling of 12016890 in words is "twelve million, sixteen thousand, eight hundred ninety".

Divisors: 1 2 3 5 6 9 10 15 18 27 30 45 54 90 135 270 44507 89014 133521 222535 267042 400563 445070 667605 801126 1201689 1335210 2002815 2403378 4005630 6008445 12016890