2379780 has 120 divisors (see below), whose sum is σ = 8110872. Its totient is φ = 580608.

The previous prime is 2379761. The next prime is 2379781. The reversal of 2379780 is 879732.

It can be written as a sum of positive squares in 4 ways, for example, as 93636 + 2286144 = 306^2 + 1512^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (2379781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (5) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 21004 + ... + 21116.

2^2379780 is an apocalyptic number.

2379780 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 2379780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4055436).

2379780 is an abundant number, since it is smaller than the sum of its proper divisors (5731092).

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

2379780 is a wasteful number, since it uses less digits than its factorization.

2379780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 136 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 36.

The square root of 2379780 is about 1542.6535579967. The cubic root of 2379780 is about 133.5095309443.

The spelling of 2379780 in words is "two million, three hundred seventy-nine thousand, seven hundred eighty".