1378640922 has 16 divisors (see below), whose sum is σ = 2759110560. Its totient is φ = 459242192.

The previous prime is 1378640917. The next prime is 1378640941. The reversal of 1378640922 is 2290468731.

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, 66297 + ... + 84572.

It is an arithmetic number, because the mean of its divisors is an integer number (172444410).

Almost surely, 2^1378640922 is an apocalyptic number.

1378640922 is an abundant number, since it is smaller than the sum of its proper divisors (1380469638).

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

1378640922 is a wasteful number, since it uses less digits than its factorization.

1378640922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152397.

The product of its (nonzero) digits is 145152, while the sum is 42.

The square root of 1378640922 is about 37130.0541610162. The cubic root of 1378640922 is about 1112.9706757619.

The spelling of 1378640922 in words is "one billion, three hundred seventy-eight million, six hundred forty thousand, nine hundred twenty-two".