22220072 has 32 divisors (see below), whose sum is σ = 47952000. Its totient is φ = 9455424.

The previous prime is 22220057. The next prime is 22220083. The reversal of 22220072 is 27002222.

It is a self number, because there is not a number n which added to its sum of digits gives 22220072.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7013 + ... + 9675.

It is an arithmetic number, because the mean of its divisors is an integer number (1498500).

Almost surely, 2^22220072 is an apocalyptic number.

It is an amenable number.

22220072 is an abundant number, since it is smaller than the sum of its proper divisors (25731928).

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

22220072 is a wasteful number, since it uses less digits than its factorization.

22220072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2825 (or 2821 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 17.

The square root of 22220072 is about 4713.8171368860. The cubic root of 22220072 is about 281.1351536365.

Adding to 22220072 its reverse (27002222), we get a palindrome (49222294).

The spelling of 22220072 in words is "twenty-two million, two hundred twenty thousand, seventy-two".