22397487 has 16 divisors (see below), whose sum is σ = 34379520. Its totient is φ = 12704832.

The previous prime is 22397477. The next prime is 22397491. The reversal of 22397487 is 78479322.

It is not a de Polignac number, because 22397487 - 2⁴ = 22397471 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22397437) 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 15 ways as a sum of consecutive naturals, for example, 918 + ... + 6755.

It is an arithmetic number, because the mean of its divisors is an integer number (2148720).

Almost surely, 2^22397487 is an apocalyptic number.

22397487 is a deficient number, since it is larger than the sum of its proper divisors (11982033).

22397487 is a wasteful number, since it uses less digits than its factorization.

22397487 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7822.

The product of its digits is 169344, while the sum is 42.

The square root of 22397487 is about 4732.5983349530. The cubic root of 22397487 is about 281.8814073040.

It can be divided in two parts, 2 and 2397487, that multiplied together give a palindrome (4794974).

The spelling of 22397487 in words is "twenty-two million, three hundred ninety-seven thousand, four hundred eighty-seven".