2311380 has 36 divisors (see below), whose sum is σ = 7011732. Its totient is φ = 616320.

The previous prime is 2311363. The next prime is 2311381. The reversal of 2311380 is 831132.

It can be written as a sum of positive squares in 2 ways, for example, as 956484 + 1354896 = 978^2 + 1164^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2311381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6241 + ... + 6600.

2^2311380 is an apocalyptic number.

2311380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2311380 is an abundant number, since it is smaller than the sum of its proper divisors (4700352).

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

2311380 is a wasteful number, since it uses less digits than its factorization.

2311380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12856 (or 12851 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 2311380 is about 1520.3223342436. The cubic root of 2311380 is about 132.2179594647.

The spelling of 2311380 in words is "two million, three hundred eleven thousand, three hundred eighty".