1838849290 has 16 divisors (see below), whose sum is σ = 3311244360. Its totient is φ = 735247360.

The previous prime is 1838849261. The next prime is 1838849297. The reversal of 1838849290 is 929488381.

It can be written as a sum of positive squares in 4 ways, for example, as 1802596849 + 36252441 = 42457^2 + 6021^2 .

It is a super-2 number, since 2×1838849290² = 6762733422667008200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1838849297) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9151 + ... + 61330.

Almost surely, 2^1838849290 is an apocalyptic number.

1838849290 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1838849290 is a deficient number, since it is larger than the sum of its proper divisors (1472395070).

1838849290 is a wasteful number, since it uses less digits than its factorization.

1838849290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73097.

The product of its (nonzero) digits is 995328, while the sum is 52.

The square root of 1838849290 is about 42881.8060487195. The cubic root of 1838849290 is about 1225.1296355936.

The spelling of 1838849290 in words is "one billion, eight hundred thirty-eight million, eight hundred forty-nine thousand, two hundred ninety".