3720872820 has 72 divisors (see below), whose sum is σ = 12119423904. Its totient is φ = 850484544.

The previous prime is 3720872783. The next prime is 3720872833. The reversal of 3720872820 is 282780273.

It is a super-2 number, since 2×3720872820² = 27689789085229504800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 629862 + ... + 635741.

It is an arithmetic number, because the mean of its divisors is an integer number (168325332).

Almost surely, 2^3720872820 is an apocalyptic number.

3720872820 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3720872820 is an abundant number, since it is smaller than the sum of its proper divisors (8398551084).

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

3720872820 is a wasteful number, since it uses less digits than its factorization.

3720872820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1265629 (or 1265620 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 39.

The square root of 3720872820 is about 60998.9575320759. The cubic root of 3720872820 is about 1549.5833524599.

The spelling of 3720872820 in words is "three billion, seven hundred twenty million, eight hundred seventy-two thousand, eight hundred twenty".