2043997956 has 576 divisors, whose sum is σ = 7539759360. Its totient is φ = 470292480.

The previous prime is 2043997937. The next prime is 2043997973. The reversal of 2043997956 is 6597993402.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

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 191 ways as a sum of consecutive naturals, for example, 27999936 + ... + 28000008.

It is an arithmetic number, because the mean of its divisors is an integer number (13089860).

Almost surely, 2^2043997956 is an apocalyptic number.

2043997956 is a gapful number since it is divisible by the number (26) 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 2043997956, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3769879680).

2043997956 is an abundant number, since it is smaller than the sum of its proper divisors (5495761404).

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

2043997956 is a wasteful number, since it uses less digits than its factorization.

2043997956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 161 (or 146 counting only the distinct ones).

The product of its (nonzero) digits is 3674160, while the sum is 54.

The square root of 2043997956 is about 45210.5956165145. The cubic root of 2043997956 is about 1269.0931083146.

It can be divided in two parts, 2043 and 997956, that added together give a palindrome (999999).

The spelling of 2043997956 in words is "two billion, forty-three million, nine hundred ninety-seven thousand, nine hundred fifty-six".