3821005920 has 48 divisors (see below), whose sum is σ = 12036170160. Its totient is φ = 1018934784.

The previous prime is 3821005919. The next prime is 3821005943. The reversal of 3821005920 is 295001283.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a Harshad number since it is a multiple of its sum of digits (30).

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 7 ways as a sum of consecutive naturals, for example, 3979735 + ... + 3980694.

It is an arithmetic number, because the mean of its divisors is an integer number (250753545).

Almost surely, 2^3821005920 is an apocalyptic number.

3821005920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3821005920 is an abundant number, since it is smaller than the sum of its proper divisors (8215164240).

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

3821005920 is a wasteful number, since it uses less digits than its factorization.

3821005920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7960447 (or 7960439 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 3821005920 is about 61814.2857274918. The cubic root of 3821005920 is about 1563.3608672244.

The spelling of 3821005920 in words is "three billion, eight hundred twenty-one million, five thousand, nine hundred twenty".