3720308985 has 24 divisors (see below), whose sum is σ = 6827862600. Its totient is φ = 1867448832.

The previous prime is 3720308983. The next prime is 3720309023. The reversal of 3720308985 is 5898030273.

It can be written as a sum of positive squares in 4 ways, for example, as 44675856 + 3675633129 = 6684^2 + 60627^2 .

It is not a de Polignac number, because 3720308985 - 2¹ = 3720308983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 3720308985.

It is not an unprimeable number, because it can be changed into a prime (3720308981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2430810 + ... + 2432339.

It is an arithmetic number, because the mean of its divisors is an integer number (284494275).

Almost surely, 2^3720308985 is an apocalyptic number.

It is an amenable number.

3720308985 is a deficient number, since it is larger than the sum of its proper divisors (3107553615).

3720308985 is a wasteful number, since it uses less digits than its factorization.

3720308985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4863177 (or 4863174 counting only the distinct ones).

The product of its (nonzero) digits is 362880, while the sum is 45.

The square root of 3720308985 is about 60994.3356796350. The cubic root of 3720308985 is about 1549.5050775042.

The spelling of 3720308985 in words is "three billion, seven hundred twenty million, three hundred eight thousand, nine hundred eighty-five".