2351988 has 36 divisors (see below), whose sum is σ = 6027840. Its totient is φ = 773136.

The previous prime is 2351969. The next prime is 2351989. The reversal of 2351988 is 8891532.

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 (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2351989) 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, 2431 + ... + 3257.

It is an arithmetic number, because the mean of its divisors is an integer number (167440).

2^2351988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2351988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3013920).

2351988 is an abundant number, since it is smaller than the sum of its proper divisors (3675852).

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

2351988 is a wasteful number, since it uses less digits than its factorization.

2351988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916 (or 911 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 2351988 is about 1533.6192487055. The cubic root of 2351988 is about 132.9877690526.

The spelling of 2351988 in words is "two million, three hundred fifty-one thousand, nine hundred eighty-eight".