1381643050 has 24 divisors (see below), whose sum is σ = 2571198156. Its totient is φ = 552368640.

The previous prime is 1381642963. The next prime is 1381643063. The reversal of 1381643050 is 503461831.

It can be written as a sum of positive squares in 6 ways, for example, as 420209001 + 961434049 = 20499^2 + 31007^2 .

It is a super-2 number, since 2×1381643050² = 3817875035226605000, which contains 22 as substring.

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, 107572 + ... + 119728.

Almost surely, 2^1381643050 is an apocalyptic number.

1381643050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381643050 is a deficient number, since it is larger than the sum of its proper divisors (1189555106).

1381643050 is a wasteful number, since it uses less digits than its factorization.

1381643050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14442 (or 14437 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 1381643050 is about 37170.4593730021. The cubic root of 1381643050 is about 1113.7779582534. Note that the first 3 decimals are identical.

The spelling of 1381643050 in words is "one billion, three hundred eighty-one million, six hundred forty-three thousand, fifty".