2312301990 has 64 divisors (see below), whose sum is σ = 5724990720. Its totient is φ = 597421440.

The previous prime is 2312301989. The next prime is 2312301991. The reversal of 2312301990 is 991032132.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (2312301989) and next prime (2312301991).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2312301991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 113181 + ... + 132039.

It is an arithmetic number, because the mean of its divisors is an integer number (89452980).

Almost surely, 2^2312301990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2312301990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2862495360).

2312301990 is an abundant number, since it is smaller than the sum of its proper divisors (3412688730).

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

2312301990 is a wasteful number, since it uses less digits than its factorization.

2312301990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18997.

The product of its (nonzero) digits is 2916, while the sum is 30.

The square root of 2312301990 is about 48086.4013001597. The cubic root of 2312301990 is about 1322.3553733757.

The spelling of 2312301990 in words is "two billion, three hundred twelve million, three hundred one thousand, nine hundred ninety".