2100340 has 24 divisors (see below), whose sum is σ = 4812192. Its totient is φ = 763680.

The previous prime is 2100313. The next prime is 2100353. The reversal of 2100340 is 430012.

It is a super-2 number, since 2×2100340² = 8822856231200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (10).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4554 + ... + 4993.

It is an arithmetic number, because the mean of its divisors is an integer number (200508).

2^2100340 is an apocalyptic number.

2100340 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2100340 is an abundant number, since it is smaller than the sum of its proper divisors (2711852).

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

2100340 is a wasteful number, since it uses less digits than its factorization.

2100340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567 (or 9565 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 2100340 is about 1449.2549810161. The cubic root of 2100340 is about 128.0648271880.

Adding to 2100340 its reverse (430012), we get a palindrome (2530352).

The spelling of 2100340 in words is "two million, one hundred thousand, three hundred forty".