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3027981 = 31191757
BaseRepresentation
bin1011100011010000001101
312200211121110
423203100031
51233343411
6144522233
734510635
oct13432015
95624543
103027981
111788a70
121020379
13820308
1458b6c5
153ec2a6
hex2e340d

3027981 has 8 divisors (see below), whose sum is σ = 4404384. Its totient is φ = 1835120.

The previous prime is 3027971. The next prime is 3028001. The reversal of 3027981 is 1897203.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 3027981 - 26 = 3027917 is a prime.

It is a super-2 number, since 2×30279812 = 18337337872722, which contains 22 as substring.

3027981 is a lucky number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3027901) 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, 45846 + ... + 45911.

It is an arithmetic number, because the mean of its divisors is an integer number (550548).

Almost surely, 23027981 is an apocalyptic number.

It is an amenable number.

3027981 is a deficient number, since it is larger than the sum of its proper divisors (1376403).

3027981 is a wasteful number, since it uses less digits than its factorization.

3027981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 91771.

The product of its (nonzero) digits is 3024, while the sum is 30.

The square root of 3027981 is about 1740.1094793144. The cubic root of 3027981 is about 144.6719655398.

The spelling of 3027981 in words is "three million, twenty-seven thousand, nine hundred eighty-one".

Divisors: 1 3 11 33 91757 275271 1009327 3027981