4001340 has 72 divisors (see below), whose sum is σ = 13042512. Its totient is φ = 913920.

The previous prime is 4001339. The next prime is 4001357. The reversal of 4001340 is 431004.

It is a Harshad number since it is a multiple of its sum of digits (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2260 + ... + 3620.

It is an arithmetic number, because the mean of its divisors is an integer number (181146).

Almost surely, 2^4001340 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 4001340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6521256).

4001340 is an abundant number, since it is smaller than the sum of its proper divisors (9041172).

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

4001340 is a wasteful number, since it uses less digits than its factorization.

4001340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1387 (or 1378 counting only the distinct ones).

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 4001340 is about 2000.3349719484. The cubic root of 4001340 is about 158.7578291962.

Adding to 4001340 its reverse (431004), we get a palindrome (4432344).

The spelling of 4001340 in words is "four million, one thousand, three hundred forty".