3845019640 has 64 divisors (see below), whose sum is σ = 10786037760. Its totient is φ = 1198446720.

The previous prime is 3845019617. The next prime is 3845019653. The reversal of 3845019640 is 469105483.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 3845019593 and 3845019602.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621112 + ... + 627271.

It is an arithmetic number, because the mean of its divisors is an integer number (168531840).

Almost surely, 2^3845019640 is an apocalyptic number.

It is an amenable number.

3845019640 is an abundant number, since it is smaller than the sum of its proper divisors (6941018120).

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

3845019640 is a wasteful number, since it uses less digits than its factorization.

3845019640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1248412 (or 1248408 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 40.

The square root of 3845019640 is about 62008.2223580067. Note that the first 3 decimals coincide. The cubic root of 3845019640 is about 1566.6290936112.

The spelling of 3845019640 in words is "three billion, eight hundred forty-five million, nineteen thousand, six hundred forty".