1381382478 has 32 divisors (see below), whose sum is σ = 3508273920. Its totient is φ = 394680600.

The previous prime is 1381382473. The next prime is 1381382501. The reversal of 1381382478 is 8742831831.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1381382473) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1826848 + ... + 1827603.

It is an arithmetic number, because the mean of its divisors is an integer number (109633560).

Almost surely, 2^1381382478 is an apocalyptic number.

1381382478 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1381382478 is an abundant number, since it is smaller than the sum of its proper divisors (2126891442).

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

1381382478 is a wasteful number, since it uses less digits than its factorization.

1381382478 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3654469 (or 3654463 counting only the distinct ones).

The product of its digits is 258048, while the sum is 45.

The square root of 1381382478 is about 37166.9541124908. The cubic root of 1381382478 is about 1113.7079359234.

The spelling of 1381382478 in words is "one billion, three hundred eighty-one million, three hundred eighty-two thousand, four hundred seventy-eight".