3813747840 has 512 divisors, whose sum is σ = 15833664000. Its totient is φ = 849346560.

The previous prime is 3813747823. The next prime is 3813747851. The reversal of 3813747840 is 487473183.

3813747840 is a `hidden beast` number, since 3 + 8 + 137 + 478 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 4958976 + ... + 4959744.

It is an arithmetic number, because the mean of its divisors is an integer number (30925125).

Almost surely, 2^3813747840 is an apocalyptic number.

3813747840 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 3813747840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7916832000).

3813747840 is an abundant number, since it is smaller than the sum of its proper divisors (12019916160).

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

3813747840 is a wasteful number, since it uses less digits than its factorization.

3813747840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 845 (or 827 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 3813747840 is about 61755.5490624122. The cubic root of 3813747840 is about 1562.3703609990.

The spelling of 3813747840 in words is "three billion, eight hundred thirteen million, seven hundred forty-seven thousand, eight hundred forty".