1381902336 has 192 divisors, whose sum is σ = 4165761600. Its totient is φ = 452542464.

The previous prime is 1381902331. The next prime is 1381902349. The reversal of 1381902336 is 6332091831.

1381902336 is a `hidden beast` number, since 138 + 190 + 2 + 336 = 666.

It is a tau number, because it is divible by the number of its divisors (192).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1381902336.

It is not an unprimeable number, because it can be changed into a prime (1381902331) 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, 3704646 + ... + 3705018.

It is an arithmetic number, because the mean of its divisors is an integer number (21696675).

Almost surely, 2^1381902336 is an apocalyptic number.

1381902336 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381902336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082880800).

1381902336 is an abundant number, since it is smaller than the sum of its proper divisors (2783859264).

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

1381902336 is an equidigital number, since it uses as much as digits as its factorization.

1381902336 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 471 (or 445 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 36.

The square root of 1381902336 is about 37173.9470059341. The cubic root of 1381902336 is about 1113.8476262641.

The spelling of 1381902336 in words is "one billion, three hundred eighty-one million, nine hundred two thousand, three hundred thirty-six".