2331396990 has 96 divisors (see below), whose sum is σ = 6625565856. Its totient is φ = 565297920.

The previous prime is 2331396953. The next prime is 2331397021. The reversal of 2331396990 is 996931332.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 63520 + ... + 93260.

It is an arithmetic number, because the mean of its divisors is an integer number (69016311).

Almost surely, 2^2331396990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2331396990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3312782928).

2331396990 is an abundant number, since it is smaller than the sum of its proper divisors (4294168866).

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

2331396990 is a wasteful number, since it uses less digits than its factorization.

2331396990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29834 (or 29831 counting only the distinct ones).

The product of its (nonzero) digits is 236196, while the sum is 45.

The square root of 2331396990 is about 48284.5419363175. The cubic root of 2331396990 is about 1325.9854048611.

The spelling of 2331396990 in words is "two billion, three hundred thirty-one million, three hundred ninety-six thousand, nine hundred ninety".