1381923536 has 40 divisors (see below), whose sum is σ = 3193021824. Its totient is φ = 566501760.

The previous prime is 1381923533. The next prime is 1381923541. The reversal of 1381923536 is 6353291831.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1381923493 and 1381923502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381923533) 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, 265655 + ... + 270806.

Almost surely, 2^1381923536 is an apocalyptic number.

1381923536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1381923536 is an abundant number, since it is smaller than the sum of its proper divisors (1811098288).

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

1381923536 is a wasteful number, since it uses less digits than its factorization.

1381923536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536499 (or 536493 counting only the distinct ones).

The product of its digits is 116640, while the sum is 41.

The square root of 1381923536 is about 37174.2321507789. The cubic root of 1381923536 is about 1113.8533221439.

The spelling of 1381923536 in words is "one billion, three hundred eighty-one million, nine hundred twenty-three thousand, five hundred thirty-six".