22987237 has 8 divisors (see below), whose sum is σ = 28292096. Its totient is φ = 18187632.

The previous prime is 22987229. The next prime is 22987243. The reversal of 22987237 is 73278922.

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

It is a cyclic number.

It is not a de Polignac number, because 22987237 - 2³ = 22987229 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22987237.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22987267) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 126213 + ... + 126394.

It is an arithmetic number, because the mean of its divisors is an integer number (3536512).

Almost surely, 2^22987237 is an apocalyptic number.

It is an amenable number.

22987237 is a deficient number, since it is larger than the sum of its proper divisors (5304859).

22987237 is a wasteful number, since it uses less digits than its factorization.

22987237 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252627.

The product of its digits is 84672, while the sum is 40.

The square root of 22987237 is about 4794.5007039315. The cubic root of 22987237 is about 284.3340849560.

The spelling of 22987237 in words is "twenty-two million, nine hundred eighty-seven thousand, two hundred thirty-seven".