3721140 has 60 divisors (see below), whose sum is σ = 11678436. Its totient is φ = 991872.

The previous prime is 3721129. The next prime is 3721141. The reversal of 3721140 is 411273.

It can be written as a sum of positive squares in 2 ways, for example, as 1542564 + 2178576 = 1242^2 + 1476^2 .

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721141) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 472 + ... + 2768.

Almost surely, 2^3721140 is an apocalyptic number.

3721140 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3721140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5839218).

3721140 is an abundant number, since it is smaller than the sum of its proper divisors (7957296).

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

3721140 is a wasteful number, since it uses less digits than its factorization.

3721140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2318 (or 2307 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 3721140 is about 1929.0256607936. The cubic root of 3721140 is about 154.9620441228.

The spelling of 3721140 in words is "three million, seven hundred twenty-one thousand, one hundred forty".