1381384740 has 48 divisors (see below), whose sum is σ = 4071453120. Its totient is φ = 348981120.

The previous prime is 1381384729. The next prime is 1381384783. The reversal of 1381384740 is 474831831.

1381384740 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 604731 + ... + 607010.

It is an arithmetic number, because the mean of its divisors is an integer number (84821940).

Almost surely, 2^1381384740 is an apocalyptic number.

1381384740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1381384740 is an abundant number, since it is smaller than the sum of its proper divisors (2690068380).

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

1381384740 is a wasteful number, since it uses less digits than its factorization.

1381384740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1211772 (or 1211770 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The square root of 1381384740 is about 37166.9845427363. The cubic root of 1381384740 is about 1113.7085438183.

The spelling of 1381384740 in words is "one billion, three hundred eighty-one million, three hundred eighty-four thousand, seven hundred forty".