22040426 has 4 divisors (see below), whose sum is σ = 33060642. Its totient is φ = 11020212.

The previous prime is 22040393. The next prime is 22040429. The reversal of 22040426 is 62404022.

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., 15202201 + 6838225 = 3899^2 + 2615^2 .

It is a super-2 number, since 2×22040426² = 971560756522952, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 22040398 and 22040407.

It is not an unprimeable number, because it can be changed into a prime (22040429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5510105 + ... + 5510108.

Almost surely, 2^22040426 is an apocalyptic number.

22040426 is a deficient number, since it is larger than the sum of its proper divisors (11020216).

22040426 is a wasteful number, since it uses less digits than its factorization.

22040426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11020215.

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 22040426 is about 4694.7232080283. The cubic root of 22040426 is about 280.3754572018.

Adding to 22040426 its reverse (62404022), we get a palindrome (84444448).

The spelling of 22040426 in words is "twenty-two million, forty thousand, four hundred twenty-six".