1222761764 has 12 divisors (see below), whose sum is σ = 2445523584. Its totient is φ = 524040744.

The previous prime is 1222761707. The next prime is 1222761769. The reversal of 1222761764 is 4671672221.

1222761764 is an admirable number.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (1222761769) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21835004 + ... + 21835059.

It is an arithmetic number, because the mean of its divisors is an integer number (203793632).

Almost surely, 2^1222761764 is an apocalyptic number.

1222761764 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1222761764 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1222761764 is a wasteful number, since it uses less digits than its factorization.

1222761764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43670074 (or 43670072 counting only the distinct ones).

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

The square root of 1222761764 is about 34968.0105811011. The cubic root of 1222761764 is about 1069.3354140153.

The spelling of 1222761764 in words is "one billion, two hundred twenty-two million, seven hundred sixty-one thousand, seven hundred sixty-four".