4008997720 has 320 divisors, whose sum is σ = 11999484000. Its totient is φ = 1202003712.

The previous prime is 4008997703. The next prime is 4008997763. The reversal of 4008997720 is 277998004.

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 79 ways as a sum of consecutive naturals, for example, 210999871 + ... + 210999889.

Almost surely, 2^4008997720 is an apocalyptic number.

4008997720 is a gapful number since it is divisible by the number (40) 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 4008997720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5999742000).

4008997720 is an abundant number, since it is smaller than the sum of its proper divisors (7990486280).

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

4008997720 is an equidigital number, since it uses as much as digits as its factorization.

4008997720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97 (or 46 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The square root of 4008997720 is about 63316.6464683656. The cubic root of 4008997720 is about 1588.5904098039.

The spelling of 4008997720 in words is "four billion, eight million, nine hundred ninety-seven thousand, seven hundred twenty".