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15230489 = 79192791
BaseRepresentation
bin111010000110…
…011000011001
31001122210022012
4322012120121
512344333424
61302235305
7243312521
oct72063031
931583265
1015230489
11866298a
125125b35
133203531
142046681
15150cb0e
hexe86619

15230489 has 4 divisors (see below), whose sum is σ = 15423360. Its totient is φ = 15037620.

The previous prime is 15230483. The next prime is 15230503. The reversal of 15230489 is 98403251.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 15230489 - 24 = 15230473 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (15230483) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 96317 + ... + 96474.

It is an arithmetic number, because the mean of its divisors is an integer number (3855840).

Almost surely, 215230489 is an apocalyptic number.

It is an amenable number.

15230489 is a deficient number, since it is larger than the sum of its proper divisors (192871).

15230489 is an equidigital number, since it uses as much as digits as its factorization.

15230489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192870.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 15230489 is about 3902.6259108452. The cubic root of 15230489 is about 247.8779804271.

The spelling of 15230489 in words is "fifteen million, two hundred thirty thousand, four hundred eighty-nine".

Divisors: 1 79 192791 15230489