1381788290 has 16 divisors (see below), whose sum is σ = 2498084280. Its totient is φ = 550300800.

The previous prime is 1381788277. The next prime is 1381788307. The reversal of 1381788290 is 928871831.

It can be written as a sum of positive squares in 4 ways, for example, as 1353283369 + 28504921 = 36787^2 + 5339^2 .

It is a super-2 number, since 2×1381788290² = 3818677756762248200, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 299411 + ... + 303990.

Almost surely, 2^1381788290 is an apocalyptic number.

1381788290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1381788290 is a deficient number, since it is larger than the sum of its proper divisors (1116295990).

1381788290 is a wasteful number, since it uses less digits than its factorization.

1381788290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 603637.

The product of its (nonzero) digits is 193536, while the sum is 47.

The square root of 1381788290 is about 37172.4130236389. The cubic root of 1381788290 is about 1113.8169841177.

The spelling of 1381788290 in words is "one billion, three hundred eighty-one million, seven hundred eighty-eight thousand, two hundred ninety".