2103780 has 48 divisors (see below), whose sum is σ = 6733440. Its totient is φ = 480768.

The previous prime is 2103769. The next prime is 2103781. The reversal of 2103780 is 873012.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (2103781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2085 + ... + 2924.

It is an arithmetic number, because the mean of its divisors is an integer number (140280).

2^2103780 is an apocalyptic number.

2103780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2103780 is an abundant number, since it is smaller than the sum of its proper divisors (4629660).

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

2103780 is a wasteful number, since it uses less digits than its factorization.

2103780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5028 (or 5026 counting only the distinct ones).

The product of its (nonzero) digits is 336, while the sum is 21.

The square root of 2103780 is about 1450.4413121530. The cubic root of 2103780 is about 128.1347051938.

Adding to 2103780 its reverse (873012), we get a palindrome (2976792).

The spelling of 2103780 in words is "two million, one hundred three thousand, seven hundred eighty".