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8989471 = 28131991
BaseRepresentation
bin100010010010…
…101100011111
3121220201020101
4202102230133
54300130341
6520401531
7136260241
oct42225437
917821211
108989471
11508aa17
1230162a7
131b2991a
1412a0091
15bc8831
hex892b1f

8989471 has 4 divisors (see below), whose sum is σ = 9021744. Its totient is φ = 8957200.

The previous prime is 8989469. The next prime is 8989493. The reversal of 8989471 is 1749898.

It is a happy number.

8989471 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 8989471 - 21 = 8989469 is a prime.

It is a super-3 number, since 3×89894713 (a number of 22 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8989571) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15715 + ... + 16276.

It is an arithmetic number, because the mean of its divisors is an integer number (2255436).

Almost surely, 28989471 is an apocalyptic number.

8989471 is a deficient number, since it is larger than the sum of its proper divisors (32273).

8989471 is a wasteful number, since it uses less digits than its factorization.

8989471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32272.

The product of its digits is 145152, while the sum is 46.

The square root of 8989471 is about 2998.2446531262. The cubic root of 8989471 is about 207.9272350875.

The spelling of 8989471 in words is "eight million, nine hundred eighty-nine thousand, four hundred seventy-one".

Divisors: 1 281 31991 8989471