3856745340 has 672 divisors, whose sum is σ = 15230509056. Its totient is φ = 800616960.

The previous prime is 3856745323. The next prime is 3856745359. The reversal of 3856745340 is 435476583.

3856745340 is a `hidden beast` number, since 3 + 8 + 567 + 45 + 3 + 40 = 666.

It is a super-2 number, since 2×3856745340² = 29748969235223431200, which contains 22 as substring.

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

It is a congruent number.

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 223 ways as a sum of consecutive naturals, for example, 72768754 + ... + 72768806.

It is an arithmetic number, because the mean of its divisors is an integer number (22664448).

Almost surely, 2^3856745340 is an apocalyptic number.

3856745340 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 3856745340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7615254528).

3856745340 is an abundant number, since it is smaller than the sum of its proper divisors (11373763716).

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

3856745340 is a wasteful number, since it uses less digits than its factorization.

3856745340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141 (or 124 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The square root of 3856745340 is about 62102.6999413069. The cubic root of 3856745340 is about 1568.2199984380.

The spelling of 3856745340 in words is "three billion, eight hundred fifty-six million, seven hundred forty-five thousand, three hundred forty".