22077442 has 4 divisors (see below), whose sum is σ = 33116166. Its totient is φ = 11038720.

The previous prime is 22077437. The next prime is 22077443. The reversal of 22077442 is 24477022.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24477022 = 2 ⋅12238511.

It can be written as a sum of positive squares in only one way, i.e., 15832441 + 6245001 = 3979^2 + 2499^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22077442.

It is not an unprimeable number, because it can be changed into a prime (22077443) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5519359 + ... + 5519362.

Almost surely, 2^22077442 is an apocalyptic number.

22077442 is a deficient number, since it is larger than the sum of its proper divisors (11038724).

22077442 is a wasteful number, since it uses less digits than its factorization.

22077442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11038723.

The product of its (nonzero) digits is 6272, while the sum is 28.

The square root of 22077442 is about 4698.6638526287. The cubic root of 22077442 is about 280.5323291442.

The spelling of 22077442 in words is "twenty-two million, seventy-seven thousand, four hundred forty-two".