1855199040 has 112 divisors (see below), whose sum is σ = 6015727872. Its totient is φ = 484182016.

The previous prime is 1855199033. The next prime is 1855199053. The reversal of 1855199040 is 409915581.

It is a super-4 number, since 4×1855199040⁴ (a number of 38 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1855198983 and 1855199001.

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 15 ways as a sum of consecutive naturals, for example, 24562 + ... + 65678.

It is an arithmetic number, because the mean of its divisors is an integer number (53711856).

Almost surely, 2^1855199040 is an apocalyptic number.

1855199040 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 1855199040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3007863936).

1855199040 is an abundant number, since it is smaller than the sum of its proper divisors (4160528832).

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

1855199040 is a wasteful number, since it uses less digits than its factorization.

1855199040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41184 (or 41174 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 42.

The square root of 1855199040 is about 43072.0215453141. The cubic root of 1855199040 is about 1228.7499230216.

The spelling of 1855199040 in words is "one billion, eight hundred fifty-five million, one hundred ninety-nine thousand, forty".