2356640 has 96 divisors (see below), whose sum is σ = 6604416. Its totient is φ = 783360.

The previous prime is 2356621. The next prime is 2356643. The reversal of 2356640 is 466532.

2356640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (2356643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22829 + ... + 22931.

It is an arithmetic number, because the mean of its divisors is an integer number (68796).

2^2356640 is an apocalyptic number.

2356640 is a gapful number since it is divisible by the number (20) 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 2356640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3302208).

2356640 is an abundant number, since it is smaller than the sum of its proper divisors (4247776).

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

2356640 is a wasteful number, since it uses less digits than its factorization.

2356640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142 (or 134 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 2356640 is about 1535.1351732014. The cubic root of 2356640 is about 133.0753902007.

The spelling of 2356640 in words is "two million, three hundred fifty-six thousand, six hundred forty".