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23013442 = 289129289
BaseRepresentation
bin101011111001…
…0100001000010
31121022012111201
41113302201002
521342412232
62141131414
7366416404
oct127624102
947265451
1023013442
1111a99381
127859b6a
1349c9c2a
1430b0b74
152048be7
hex15f2842

23013442 has 8 divisors (see below), whose sum is σ = 34908300. Its totient is φ = 11377344.

The previous prime is 23013433. The next prime is 23013449. The reversal of 23013442 is 24431032.

It can be written as a sum of positive squares in 2 ways, for example, as 22762441 + 251001 = 4771^2 + 501^2 .

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

It is not an unprimeable number, because it can be changed into a prime (23013449) 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, 64467 + ... + 64822.

Almost surely, 223013442 is an apocalyptic number.

23013442 is a deficient number, since it is larger than the sum of its proper divisors (11894858).

23013442 is a wasteful number, since it uses less digits than its factorization.

23013442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129380.

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 23013442 is about 4797.2327439890. The cubic root of 23013442 is about 284.4420890217.

Adding to 23013442 its reverse (24431032), we get a palindrome (47444474).

The spelling of 23013442 in words is "twenty-three million, thirteen thousand, four hundred forty-two".

Divisors: 1 2 89 178 129289 258578 11506721 23013442