1381353730 has 16 divisors (see below), whose sum is σ = 2509250040. Its totient is φ = 547471872.

The previous prime is 1381353719. The next prime is 1381353731. The reversal of 1381353730 is 373531831.

It is a happy number.

1381353730 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 1073807361 + 307546369 = 32769^2 + 17537^2 .

It is not an unprimeable number, because it can be changed into a prime (1381353731) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632559 + ... + 634738.

Almost surely, 2^1381353730 is an apocalyptic number.

1381353730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381353730 is a deficient number, since it is larger than the sum of its proper divisors (1127896310).

1381353730 is a wasteful number, since it uses less digits than its factorization.

1381353730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1267413.

The product of its (nonzero) digits is 22680, while the sum is 34.

The square root of 1381353730 is about 37166.5673690751. The cubic root of 1381353730 is about 1113.7002100646.

The spelling of 1381353730 in words is "one billion, three hundred eighty-one million, three hundred fifty-three thousand, seven hundred thirty".