1222797440 has 64 divisors (see below), whose sum is σ = 3077136000. Its totient is φ = 463371264.

The previous prime is 1222797419. The next prime is 1222797463. The reversal of 1222797440 is 447972221.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (38).

It is a junction number, because it is equal to n+sod(n) for n = 1222797394 and 1222797403.

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, 38120 + ... + 62439.

It is an arithmetic number, because the mean of its divisors is an integer number (48080250).

Almost surely, 2^1222797440 is an apocalyptic number.

1222797440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222797440 is an abundant number, since it is smaller than the sum of its proper divisors (1854338560).

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

1222797440 is a wasteful number, since it uses less digits than its factorization.

1222797440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100597 (or 100585 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 38.

The square root of 1222797440 is about 34968.5207007674. The cubic root of 1222797440 is about 1069.3458137623.

The spelling of 1222797440 in words is "one billion, two hundred twenty-two million, seven hundred ninety-seven thousand, four hundred forty".