1222890444 has 72 divisors (see below), whose sum is σ = 3385942560. Its totient is φ = 370417152.

The previous prime is 1222890437. The next prime is 1222890491. The reversal of 1222890444 is 4440982221.

1222890444 is a `hidden beast` number, since 122 + 2 + 8 + 90 + 444 = 666.

It is a super-2 number, since 2×1222890444² = 2990922076053034272, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1222890399 and 1222890408.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16704 + ... + 52199.

It is an arithmetic number, because the mean of its divisors is an integer number (47026980).

Almost surely, 2^1222890444 is an apocalyptic number.

It is an amenable number.

1222890444 is an abundant number, since it is smaller than the sum of its proper divisors (2163052116).

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

1222890444 is a wasteful number, since it uses less digits than its factorization.

1222890444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68959 (or 68954 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 36.

The square root of 1222890444 is about 34969.8505001094. The cubic root of 1222890444 is about 1069.3729239807.

The spelling of 1222890444 in words is "one billion, two hundred twenty-two million, eight hundred ninety thousand, four hundred forty-four".