3641880 has 128 divisors (see below), whose sum is σ = 12441600. Its totient is φ = 844800.

The previous prime is 3641867. The next prime is 3641881. The reversal of 3641880 is 881463.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3641881) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40876 + ... + 40964.

It is an arithmetic number, because the mean of its divisors is an integer number (97200).

Almost surely, 2^3641880 is an apocalyptic number.

3641880 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 3641880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6220800).

3641880 is an abundant number, since it is smaller than the sum of its proper divisors (8799720).

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

3641880 is a wasteful number, since it uses less digits than its factorization.

3641880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 145 (or 141 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 3641880 is about 1908.3710331065. The cubic root of 3641880 is about 153.8539121729.

The spelling of 3641880 in words is "three million, six hundred forty-one thousand, eight hundred eighty".