2154407808 has 128 divisors (see below), whose sum is σ = 6679710720. Its totient is φ = 602413056.

The previous prime is 2154407797. The next prime is 2154407809. The reversal of 2154407808 is 8087044512.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2154407809) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 117810 + ... + 134862.

It is an arithmetic number, because the mean of its divisors is an integer number (52185240).

Almost surely, 2^2154407808 is an apocalyptic number.

2154407808 is a gapful number since it is divisible by the number (28) 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 2154407808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3339855360).

2154407808 is an abundant number, since it is smaller than the sum of its proper divisors (4525302912).

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

2154407808 is a wasteful number, since it uses less digits than its factorization.

2154407808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17124 (or 17112 counting only the distinct ones).

The product of its (nonzero) digits is 71680, while the sum is 39.

The square root of 2154407808 is about 46415.5987573143. The cubic root of 2154407808 is about 1291.5442932076.

The spelling of 2154407808 in words is "two billion, one hundred fifty-four million, four hundred seven thousand, eight hundred eight".