1381007916 has 18 divisors (see below), whose sum is σ = 3490881212. Its totient is φ = 460335960.

The previous prime is 1381007911. The next prime is 1381007921. The reversal of 1381007916 is 6197001831.

It is an interprime number because it is at equal distance from previous prime (1381007911) and next prime (1381007921).

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 38361331 = 1381007916 / (1 + 3 + 8 + 1 + 0 + 0 + 7 + 9 + 1 + 6).

It is not an unprimeable number, because it can be changed into a prime (1381007911) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 19180630 + ... + 19180701.

Almost surely, 2^1381007916 is an apocalyptic number.

It is an amenable number.

1381007916 is an abundant number, since it is smaller than the sum of its proper divisors (2109873296).

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

1381007916 is a wasteful number, since it uses less digits than its factorization.

1381007916 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38361341 (or 38361336 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 1381007916 is about 37161.9148591673. The cubic root of 1381007916 is about 1113.6072661504.

The spelling of 1381007916 in words is "one billion, three hundred eighty-one million, seven thousand, nine hundred sixteen".