1381907616 has 48 divisors (see below), whose sum is σ = 3630370464. Its totient is φ = 460272384.

The previous prime is 1381907591. The next prime is 1381907627. The reversal of 1381907616 is 6167091831.

It is a tau number, because it is divible by the number of its divisors (48).

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, 134535 + ... + 144441.

It is an arithmetic number, because the mean of its divisors is an integer number (75632718).

Almost surely, 2^1381907616 is an apocalyptic number.

1381907616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1381907616 is an abundant number, since it is smaller than the sum of its proper divisors (2248462848).

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

1381907616 is a wasteful number, since it uses less digits than its factorization.

1381907616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11373 (or 11365 counting only the distinct ones).

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 1381907616 is about 37174.0180233453. The cubic root of 1381907616 is about 1113.8490448661.

The spelling of 1381907616 in words is "one billion, three hundred eighty-one million, nine hundred seven thousand, six hundred sixteen".