1222491288 has 64 divisors (see below), whose sum is σ = 3205058400. Its totient is φ = 388039680.

The previous prime is 1222491271. The next prime is 1222491307. The reversal of 1222491288 is 8821942221.

1222491288 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38778 + ... + 62838.

Almost surely, 2^1222491288 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1222491288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1602529200).

1222491288 is an abundant number, since it is smaller than the sum of its proper divisors (1982567112).

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

1222491288 is a wasteful number, since it uses less digits than its factorization.

1222491288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24172 (or 24168 counting only the distinct ones).

The product of its digits is 36864, while the sum is 39.

The square root of 1222491288 is about 34964.1428895376. The cubic root of 1222491288 is about 1069.2565622164.

The spelling of 1222491288 in words is "one billion, two hundred twenty-two million, four hundred ninety-one thousand, two hundred eighty-eight".