Search a number
-
+
168445490 = 2516844549
BaseRepresentation
bin10100000101001…
…00011000110010
3102201221220202212
422002210120302
5321110223430
624414212122
74113522503
oct1202443062
9381856685
10168445490
11870a0654
12484b4042
1328b898b5
141852abaa
15ebc4b95
hexa0a4632

168445490 has 8 divisors (see below), whose sum is σ = 303201900. Its totient is φ = 67378192.

The previous prime is 168445489. The next prime is 168445513. The reversal of 168445490 is 94544861.

It can be written as a sum of positive squares in 2 ways, for example, as 167365969 + 1079521 = 12937^2 + 1039^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8422265 + ... + 8422284.

Almost surely, 2168445490 is an apocalyptic number.

168445490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

168445490 is a deficient number, since it is larger than the sum of its proper divisors (134756410).

168445490 is a wasteful number, since it uses less digits than its factorization.

168445490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16844556.

The product of its (nonzero) digits is 138240, while the sum is 41.

The square root of 168445490 is about 12978.6551691614. The cubic root of 168445490 is about 552.2721322367.

It can be divided in two parts, 1684 and 45490, that added together give a palindrome (47174).

The spelling of 168445490 in words is "one hundred sixty-eight million, four hundred forty-five thousand, four hundred ninety".

Divisors: 1 2 5 10 16844549 33689098 84222745 168445490