3701221920 has 144 divisors (see below), whose sum is σ = 13778698752. Its totient is φ = 897262080.

The previous prime is 3701221883. The next prime is 3701222023. The reversal of 3701221920 is 291221073.

It is a tau number, because it is divible by the number of its divisors (144).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 100992 + ... + 132671.

It is an arithmetic number, because the mean of its divisors is an integer number (95685408).

Almost surely, 2^3701221920 is an apocalyptic number.

3701221920 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3701221920 is an abundant number, since it is smaller than the sum of its proper divisors (10077476832).

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

3701221920 is a wasteful number, since it uses less digits than its factorization.

3701221920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 233695 (or 233684 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 3701221920 is about 60837.6685943832. The cubic root of 3701221920 is about 1546.8506180669.

Adding to 3701221920 its reverse (291221073), we get a palindrome (3992442993).

The spelling of 3701221920 in words is "three billion, seven hundred one million, two hundred twenty-one thousand, nine hundred twenty".