22687738 has 4 divisors (see below), whose sum is σ = 34031610. Its totient is φ = 11343868.

The previous prime is 22687727. The next prime is 22687747. The reversal of 22687738 is 83778622.

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

It can be written as a sum of positive squares in only one way, i.e., 21372129 + 1315609 = 4623^2 + 1147^2 .

It is a super-3 number, since 3×22687738³ (a number of 23 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22687694 and 22687703.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5671933 + ... + 5671936.

Almost surely, 2^22687738 is an apocalyptic number.

22687738 is a deficient number, since it is larger than the sum of its proper divisors (11343872).

22687738 is a wasteful number, since it uses less digits than its factorization.

22687738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11343871.

The product of its digits is 225792, while the sum is 43.

The square root of 22687738 is about 4763.1647042696. The cubic root of 22687738 is about 283.0938269717.

The spelling of 22687738 in words is "twenty-two million, six hundred eighty-seven thousand, seven hundred thirty-eight".