3857750820 has 192 divisors, whose sum is σ = 14963558400. Its totient is φ = 801601920.

The previous prime is 3857750807. The next prime is 3857750821. The reversal of 3857750820 is 280577583.

3857750820 is a `hidden beast` number, since 3 + 8 + 577 + 50 + 8 + 20 = 666.

3857750820 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not an unprimeable number, because it can be changed into a prime (3857750821) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4810 + ... + 87969.

It is an arithmetic number, because the mean of its divisors is an integer number (77935200).

Almost surely, 2^3857750820 is an apocalyptic number.

3857750820 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 3857750820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7481779200).

3857750820 is an abundant number, since it is smaller than the sum of its proper divisors (11105807580).

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

3857750820 is a wasteful number, since it uses less digits than its factorization.

3857750820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 92815 (or 92807 counting only the distinct ones).

The product of its (nonzero) digits is 470400, while the sum is 45.

The square root of 3857750820 is about 62110.7947139626. The cubic root of 3857750820 is about 1568.3562685048.

The spelling of 3857750820 in words is "three billion, eight hundred fifty-seven million, seven hundred fifty thousand, eight hundred twenty".