Search a number
-
+
287204423 = 1138368171
BaseRepresentation
bin10001000111100…
…110010001000111
3202000102111101212
4101013212101013
51042011020143
644255442035
710055124452
oct2107462107
9660374355
10287204423
11138134a30
128022631b
134766a95c
142a202499
151a332918
hex111e6447

287204423 has 8 divisors (see below), whose sum is σ = 314136576. Its totient is φ = 260409400.

The previous prime is 287204417. The next prime is 287204453. The reversal of 287204423 is 324402782.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-287204423 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 287204423.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (287204453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29873 + ... + 38298.

It is an arithmetic number, because the mean of its divisors is an integer number (39267072).

Almost surely, 2287204423 is an apocalyptic number.

287204423 is a deficient number, since it is larger than the sum of its proper divisors (26932153).

287204423 is a wasteful number, since it uses less digits than its factorization.

287204423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68565.

The product of its (nonzero) digits is 21504, while the sum is 32.

The square root of 287204423 is about 16947.1066262061. The cubic root of 287204423 is about 659.7768016318.

The spelling of 287204423 in words is "two hundred eighty-seven million, two hundred four thousand, four hundred twenty-three".

Divisors: 1 11 383 4213 68171 749881 26109493 287204423