3865540770 has 192 divisors, whose sum is σ = 12908173824. Its totient is φ = 780088320.

The previous prime is 3865540741. The next prime is 3865540841. The reversal of 3865540770 is 770455683.

3865540770 is a `hidden beast` number, since 38 + 6 + 5 + 540 + 7 + 70 = 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 pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 178110 + ... + 198630.

It is an arithmetic number, because the mean of its divisors is an integer number (67230072).

Almost surely, 2^3865540770 is an apocalyptic number.

3865540770 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 3865540770, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6454086912).

3865540770 is an abundant number, since it is smaller than the sum of its proper divisors (9042633054).

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

3865540770 is a wasteful number, since it uses less digits than its factorization.

3865540770 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20577 (or 20574 counting only the distinct ones).

The product of its (nonzero) digits is 705600, while the sum is 45.

The square root of 3865540770 is about 62173.4732020015. The cubic root of 3865540770 is about 1569.4112184968.

The spelling of 3865540770 in words is "three billion, eight hundred sixty-five million, five hundred forty thousand, seven hundred seventy".