3857120904 has 128 divisors (see below), whose sum is σ = 11888835840. Its totient is φ = 1015483392.

The previous prime is 3857120903. The next prime is 3857120921. The reversal of 3857120904 is 4090217583.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (3857120903) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 1652122 + ... + 1654454.

It is an arithmetic number, because the mean of its divisors is an integer number (92881530).

Almost surely, 2^3857120904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3857120904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5944417920).

3857120904 is an abundant number, since it is smaller than the sum of its proper divisors (8031714936).

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

3857120904 is a wasteful number, since it uses less digits than its factorization.

3857120904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3119 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 39.

The square root of 3857120904 is about 62105.7236009693. The cubic root of 3857120904 is about 1568.2709004125.

The spelling of 3857120904 in words is "three billion, eight hundred fifty-seven million, one hundred twenty thousand, nine hundred four".