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561286292 = 22720045939
BaseRepresentation
bin100001011101001…
…000110010010100
31110010011022001012
4201131020302110
52122142130132
6131410151352
716623566120
oct4135106224
91403138035
10561286292
11268916776
12137b82558
138c392688
145478a580
15344220b2
hex21748c94

561286292 has 12 divisors (see below), whose sum is σ = 1122572640. Its totient is φ = 240551256.

The previous prime is 561286291. The next prime is 561286333. The reversal of 561286292 is 292682165.

561286292 is an admirable number.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (561286291) 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, 10022942 + ... + 10022997.

It is an arithmetic number, because the mean of its divisors is an integer number (93547720).

Almost surely, 2561286292 is an apocalyptic number.

It is an amenable number.

561286292 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

561286292 is a wasteful number, since it uses less digits than its factorization.

561286292 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20045950 (or 20045948 counting only the distinct ones).

The product of its digits is 103680, while the sum is 41.

The square root of 561286292 is about 23691.4814226549. The cubic root of 561286292 is about 824.8876697994.

The spelling of 561286292 in words is "five hundred sixty-one million, two hundred eighty-six thousand, two hundred ninety-two".

Divisors: 1 2 4 7 14 28 20045939 40091878 80183756 140321573 280643146 561286292