1849262640 has 80 divisors (see below), whose sum is σ = 5761961568. Its totient is φ = 490620928.

The previous prime is 1849262603. The next prime is 1849262677. The reversal of 1849262640 is 462629481.

It is an interprime number because it is at equal distance from previous prime (1849262603) and next prime (1849262677).

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 1849262592 and 1849262601.

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 15 ways as a sum of consecutive naturals, for example, 27724 + ... + 66836.

Almost surely, 2^1849262640 is an apocalyptic number.

1849262640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1849262640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2880980784).

1849262640 is an abundant number, since it is smaller than the sum of its proper divisors (3912698928).

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

1849262640 is a wasteful number, since it uses less digits than its factorization.

1849262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39326 (or 39320 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 1849262640 is about 43003.0538450469. The cubic root of 1849262640 is about 1227.4379083219.

The spelling of 1849262640 in words is "one billion, eight hundred forty-nine million, two hundred sixty-two thousand, six hundred forty".