28144526 has 4 divisors (see below), whose sum is σ = 42216792. Its totient is φ = 14072262.

The previous prime is 28144513. The next prime is 28144541. The reversal of 28144526 is 62544182.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×28144526² = 1584228687529352, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28144492 and 28144501.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 7036130 + ... + 7036133.

It is an arithmetic number, because the mean of its divisors is an integer number (10554198).

Almost surely, 2^28144526 is an apocalyptic number.

28144526 is a deficient number, since it is larger than the sum of its proper divisors (14072266).

28144526 is a wasteful number, since it uses less digits than its factorization.

28144526 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14072265.

The product of its digits is 15360, while the sum is 32.

The square root of 28144526 is about 5305.1414684248. The cubic root of 28144526 is about 304.1804604324.

The spelling of 28144526 in words is "twenty-eight million, one hundred forty-four thousand, five hundred twenty-six".