3781845840 has 320 divisors, whose sum is σ = 13082591232. Its totient is φ = 898867200.

The previous prime is 3781845757. The next prime is 3781845869. The reversal of 3781845840 is 485481873.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 3781845840.

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, 17923335 + ... + 17923545.

Almost surely, 2^3781845840 is an apocalyptic number.

3781845840 is a gapful number since it is divisible by the number (30) 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 3781845840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6541295616).

3781845840 is an abundant number, since it is smaller than the sum of its proper divisors (9300745392).

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

3781845840 is a wasteful number, since it uses less digits than its factorization.

3781845840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 458 (or 452 counting only the distinct ones).

The product of its (nonzero) digits is 860160, while the sum is 48.

The square root of 3781845840 is about 61496.7140585576. The cubic root of 3781845840 is about 1558.0017478474.

The spelling of 3781845840 in words is "three billion, seven hundred eighty-one million, eight hundred forty-five thousand, eight hundred forty".