1386631850 has 24 divisors (see below), whose sum is σ = 2595577548. Its totient is φ = 551116800.

The previous prime is 1386631789. The next prime is 1386631921. The reversal of 1386631850 is 581366831.

It can be written as a sum of positive squares in 6 ways, for example, as 464962969 + 921668881 = 21563^2 + 30359^2 .

It is a junction number, because it is equal to n+sod(n) for n = 1386631798 and 1386631807.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 80471 + ... + 96170.

Almost surely, 2^1386631850 is an apocalyptic number.

1386631850 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1386631850 is a deficient number, since it is larger than the sum of its proper divisors (1208945698).

1386631850 is a wasteful number, since it uses less digits than its factorization.

1386631850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176810 (or 176805 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 41.

The square root of 1386631850 is about 37237.5059583748. The cubic root of 1386631850 is about 1115.1168813105.

The spelling of 1386631850 in words is "one billion, three hundred eighty-six million, six hundred thirty-one thousand, eight hundred fifty".