1422213778 has 8 divisors (see below), whose sum is σ = 2258810172. Its totient is φ = 669277056.

The previous prime is 1422213769. The next prime is 1422213799. The reversal of 1422213778 is 8773122241.

It can be written as a sum of positive squares in 2 ways, for example, as 1415490129 + 6723649 = 37623^2 + 2593^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20914875 + ... + 20914942.

Almost surely, 2^1422213778 is an apocalyptic number.

1422213778 is a deficient number, since it is larger than the sum of its proper divisors (836596394).

1422213778 is a wasteful number, since it uses less digits than its factorization.

1422213778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41829836.

The product of its digits is 37632, while the sum is 37.

The square root of 1422213778 is about 37712.2497074889. The cubic root of 1422213778 is about 1124.5746613981.

The spelling of 1422213778 in words is "one billion, four hundred twenty-two million, two hundred thirteen thousand, seven hundred seventy-eight".