1853872440 has 256 divisors, whose sum is σ = 6774451200. Its totient is φ = 396189696.

The previous prime is 1853872429. The next prime is 1853872469. The reversal of 1853872440 is 442783581.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 1853872392 and 1853872401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2812831 + ... + 2813489.

It is an arithmetic number, because the mean of its divisors is an integer number (26462700).

Almost surely, 2^1853872440 is an apocalyptic number.

1853872440 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 1853872440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3387225600).

1853872440 is an abundant number, since it is smaller than the sum of its proper divisors (4920578760).

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

1853872440 is a wasteful number, since it uses less digits than its factorization.

1853872440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 894 (or 890 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 42.

The square root of 1853872440 is about 43056.6190033542. The cubic root of 1853872440 is about 1228.4569718246.

The spelling of 1853872440 in words is "one billion, eight hundred fifty-three million, eight hundred seventy-two thousand, four hundred forty".