1381787922 has 8 divisors (see below), whose sum is σ = 2763575856. Its totient is φ = 460595972.

The previous prime is 1381787917. The next prime is 1381787933. The reversal of 1381787922 is 2297871831.

It is a happy number.

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

1381787922 is an admirable number.

It is a super-2 number, since 2×1381787922² = 3818675722770156168, which contains 22 as substring.

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 3 ways as a sum of consecutive naturals, for example, 115148988 + ... + 115148999.

It is an arithmetic number, because the mean of its divisors is an integer number (345446982).

Almost surely, 2^1381787922 is an apocalyptic number.

1381787922 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.

1381787922 is a wasteful number, since it uses less digits than its factorization.

1381787922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230297992.

The product of its digits is 338688, while the sum is 48.

The square root of 1381787922 is about 37172.4080737312. The cubic root of 1381787922 is about 1113.8168852399.

The spelling of 1381787922 in words is "one billion, three hundred eighty-one million, seven hundred eighty-seven thousand, nine hundred twenty-two".