1381750650 has 480 divisors, whose sum is σ = 4822405632. Its totient is φ = 286156800.

The previous prime is 1381750649. The next prime is 1381750687. The reversal of 1381750650 is 560571831.

1381750650 is a `hidden beast` number, since 138 + 17 + 506 + 5 + 0 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 239 ways as a sum of consecutive naturals, for example, 22651620 + ... + 22651680.

Almost surely, 2^1381750650 is an apocalyptic number.

1381750650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1381750650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2411202816).

1381750650 is an abundant number, since it is smaller than the sum of its proper divisors (3440654982).

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

1381750650 is a wasteful number, since it uses less digits than its factorization.

1381750650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156 (or 142 counting only the distinct ones).

The product of its (nonzero) digits is 25200, while the sum is 36.

The square root of 1381750650 is about 37171.9067307557. The cubic root of 1381750650 is about 1113.8068705443.

The spelling of 1381750650 in words is "one billion, three hundred eighty-one million, seven hundred fifty thousand, six hundred fifty".