1222394940 has 72 divisors (see below), whose sum is σ = 3993164448. Its totient is φ = 300896640.

The previous prime is 1222394923. The next prime is 1222394989. The reversal of 1222394940 is 494932221.

1222394940 is a `hidden beast` number, since 1 + 222 + 394 + 9 + 40 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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 = 1222394895 and 1222394904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 258856 + ... + 263535.

Almost surely, 2^1222394940 is an apocalyptic number.

1222394940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1222394940 is an abundant number, since it is smaller than the sum of its proper divisors (2770769508).

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

1222394940 is a wasteful number, since it uses less digits than its factorization.

1222394940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 522419 (or 522414 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1222394940 is about 34962.7650508366. The cubic root of 1222394940 is about 1069.2284710993.

The spelling of 1222394940 in words is "one billion, two hundred twenty-two million, three hundred ninety-four thousand, nine hundred forty".