1855278240 has 96 divisors (see below), whose sum is σ = 5931455040. Its totient is φ = 487348224.

The previous prime is 1855278203. The next prime is 1855278251. The reversal of 1855278240 is 428725581.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 1855278192 and 1855278201.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3316 + ... + 61004.

It is an arithmetic number, because the mean of its divisors is an integer number (61785990).

Almost surely, 2^1855278240 is an apocalyptic number.

1855278240 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 1855278240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2965727520).

1855278240 is an abundant number, since it is smaller than the sum of its proper divisors (4076176800).

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

1855278240 is a wasteful number, since it uses less digits than its factorization.

1855278240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57774 (or 57766 counting only the distinct ones).

The product of its (nonzero) digits is 179200, while the sum is 42.

The square root of 1855278240 is about 43072.9409258295. The cubic root of 1855278240 is about 1228.7674082271.

The spelling of 1855278240 in words is "one billion, eight hundred fifty-five million, two hundred seventy-eight thousand, two hundred forty".