2179989504 has 336 divisors, whose sum is σ = 8053059840. Its totient is φ = 566231040.

The previous prime is 2179989503. The next prime is 2179989551. The reversal of 2179989504 is 4059899712.

It is a tau number, because it is divible by the number of its divisors (336).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2179989503) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 198180859 + ... + 198180869.

It is an arithmetic number, because the mean of its divisors is an integer number (23967440).

Almost surely, 2^2179989504 is an apocalyptic number.

2179989504 is a gapful number since it is divisible by the number (24) 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 2179989504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4026529920).

2179989504 is an abundant number, since it is smaller than the sum of its proper divisors (5873070336).

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

2179989504 is an frugal number, since it uses more digits than its factorization.

2179989504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67 (or 23 counting only the distinct ones).

The product of its (nonzero) digits is 1632960, while the sum is 54.

The square root of 2179989504 is about 46690.3577197691. The cubic root of 2179989504 is about 1296.6361760052.

The spelling of 2179989504 in words is "two billion, one hundred seventy-nine million, nine hundred eighty-nine thousand, five hundred four".