1381161348 has 48 divisors (see below), whose sum is σ = 4092332160. Its totient is φ = 394617312.

The previous prime is 1381161343. The next prime is 1381161391. The reversal of 1381161348 is 8431611831.

1381161348 is a `hidden beast` number, since 1 + 38 + 1 + 1 + 613 + 4 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (1381161343) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 912711 + ... + 914222.

It is an arithmetic number, because the mean of its divisors is an integer number (85256920).

Almost surely, 2^1381161348 is an apocalyptic number.

1381161348 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1381161348 is an abundant number, since it is smaller than the sum of its proper divisors (2711170812).

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

1381161348 is a wasteful number, since it uses less digits than its factorization.

1381161348 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1826953 (or 1826945 counting only the distinct ones).

The product of its digits is 13824, while the sum is 36.

The square root of 1381161348 is about 37163.9791733878. The cubic root of 1381161348 is about 1113.6485057554.

The spelling of 1381161348 in words is "one billion, three hundred eighty-one million, one hundred sixty-one thousand, three hundred forty-eight".