1869091040 has 48 divisors (see below), whose sum is σ = 4418798832. Its totient is φ = 747116544.

The previous prime is 1869091039. The next prime is 1869091069. The reversal of 1869091040 is 401909681.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 1869090985 and 1869091003.

It is a congruent number.

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, 295592 + ... + 301848.

It is an arithmetic number, because the mean of its divisors is an integer number (92058309).

Almost surely, 2^1869091040 is an apocalyptic number.

1869091040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1869091040 is an abundant number, since it is smaller than the sum of its proper divisors (2549707792).

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

1869091040 is a wasteful number, since it uses less digits than its factorization.

1869091040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8139 (or 8131 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 38.

The square root of 1869091040 is about 43232.9855550134. The cubic root of 1869091040 is about 1231.8093186084.

The spelling of 1869091040 in words is "one billion, eight hundred sixty-nine million, ninety-one thousand, forty".