2539904400 has 360 divisors, whose sum is σ = 9930435840. Its totient is φ = 595584000.

The previous prime is 2539904399. The next prime is 2539904413. The reversal of 2539904400 is 44099352.

It is a tau number, because it is divible by the number of its divisors (360).

It is a super-2 number, since 2×2539904400² = 12902228722278720000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 71 ways as a sum of consecutive naturals, for example, 1226566 + ... + 1228634.

It is an arithmetic number, because the mean of its divisors is an integer number (27584544).

Almost surely, 2^2539904400 is an apocalyptic number.

2539904400 is a gapful number since it is divisible by the number (20) 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 2539904400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4965217920).

2539904400 is an abundant number, since it is smaller than the sum of its proper divisors (7390531440).

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

2539904400 is a wasteful number, since it uses less digits than its factorization.

2539904400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2135 (or 2121 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 2539904400 is about 50397.4642219229. The cubic root of 2539904400 is about 1364.3918717657.

The spelling of 2539904400 in words is "two billion, five hundred thirty-nine million, nine hundred four thousand, four hundred".