1381437850 has 48 divisors (see below), whose sum is σ = 2929921848. Its totient is φ = 480061440.

The previous prime is 1381437817. The next prime is 1381437853. The reversal of 1381437850 is 587341831.

It can be written as a sum of positive squares in 12 ways, for example, as 8661249 + 1372776601 = 2943^2 + 37051^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1381437853) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 51459 + ... + 73558.

Almost surely, 2^1381437850 is an apocalyptic number.

1381437850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381437850 is an abundant number, since it is smaller than the sum of its proper divisors (1548483998).

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

1381437850 is a wasteful number, since it uses less digits than its factorization.

1381437850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125059 (or 125054 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 40.

The square root of 1381437850 is about 37167.6990140633. The cubic root of 1381437850 is about 1113.7228165262.

The spelling of 1381437850 in words is "one billion, three hundred eighty-one million, four hundred thirty-seven thousand, eight hundred fifty".