3855027840 has 64 divisors (see below), whose sum is σ = 12287907360. Its totient is φ = 1028006912.

The previous prime is 3855027823. The next prime is 3855027853. The reversal of 3855027840 is 487205583.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×3855027840² = 29722479294350131200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 3855027792 and 3855027801.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1001994 + ... + 1005833.

Almost surely, 2^3855027840 is an apocalyptic number.

3855027840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3855027840 is an abundant number, since it is smaller than the sum of its proper divisors (8432879520).

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

3855027840 is a wasteful number, since it uses less digits than its factorization.

3855027840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2007849 (or 2007837 counting only the distinct ones).

The product of its (nonzero) digits is 268800, while the sum is 42.

The square root of 3855027840 is about 62088.8705002757. The cubic root of 3855027840 is about 1567.9871753775.

The spelling of 3855027840 in words is "three billion, eight hundred fifty-five million, twenty-seven thousand, eight hundred forty".