3831221040 has 80 divisors (see below), whose sum is σ = 12039535968. Its totient is φ = 1007659008.

The previous prime is 3831221039. The next prime is 3831221041. The reversal of 3831221040 is 401221383.

3831221040 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (3831221039) and next prime (3831221041).

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 3831221040.

It is not an unprimeable number, because it can be changed into a prime (3831221041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 91819 + ... + 126858.

Almost surely, 2^3831221040 is an apocalyptic number.

3831221040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3831221040 is an abundant number, since it is smaller than the sum of its proper divisors (8208314928).

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

3831221040 is a wasteful number, since it uses less digits than its factorization.

3831221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218766 (or 218760 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 24.

The square root of 3831221040 is about 61896.8580785810. The cubic root of 3831221040 is about 1564.7527963751.

The spelling of 3831221040 in words is "three billion, eight hundred thirty-one million, two hundred twenty-one thousand, forty".