22235778 has 12 divisors (see below), whose sum is σ = 48177558. Its totient is φ = 7411920.

The previous prime is 22235767. The next prime is 22235797. The reversal of 22235778 is 87753222.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 22212369 + 23409 = 4713^2 + 153^2 .

It is a plaindrome in base 10.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 617643 + ... + 617678.

Almost surely, 2^22235778 is an apocalyptic number.

22235778 is an abundant number, since it is smaller than the sum of its proper divisors (25941780).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22235778 is a wasteful number, since it uses less digits than its factorization.

22235778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1235329 (or 1235326 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 22235778 is about 4715.4827960666. The cubic root of 22235778 is about 281.2013770760.

It can be divided in two parts, 2223 and 5778, that added together give a triangular number (8001 = T₁₂₆).

The spelling of 22235778 in words is "twenty-two million, two hundred thirty-five thousand, seven hundred seventy-eight".