3720388 has 48 divisors (see below), whose sum is σ = 7983360. Its totient is φ = 1482624.

The previous prime is 3720383. The next prime is 3720391. The reversal of 3720388 is 8830273.

It is not an unprimeable number, because it can be changed into a prime (3720383) 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, 34078 + ... + 34186.

It is an arithmetic number, because the mean of its divisors is an integer number (166320).

Almost surely, 2^3720388 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3720388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3991680).

3720388 is an abundant number, since it is smaller than the sum of its proper divisors (4262972).

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

3720388 is a wasteful number, since it uses less digits than its factorization.

3720388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 194 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 31.

The square root of 3720388 is about 1928.8307338904. The cubic root of 3720388 is about 154.9516047317.

The spelling of 3720388 in words is "three million, seven hundred twenty thousand, three hundred eighty-eight".