3640380 has 96 divisors (see below), whose sum is σ = 11176704. Its totient is φ = 881664.

The previous prime is 3640379. The next prime is 3640391. The reversal of 3640380 is 830463.

It is a self number, because there is not a number n which added to its sum of digits gives 3640380.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 43819 + ... + 43901.

It is an arithmetic number, because the mean of its divisors is an integer number (116424).

Almost surely, 2^3640380 is an apocalyptic number.

3640380 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 3640380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5588352).

3640380 is an abundant number, since it is smaller than the sum of its proper divisors (7536324).

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

3640380 is a wasteful number, since it uses less digits than its factorization.

3640380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 155 (or 153 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 3640380 is about 1907.9779872944. The cubic root of 3640380 is about 153.8327864027.

The spelling of 3640380 in words is "three million, six hundred forty thousand, three hundred eighty".