2539807920 has 320 divisors, whose sum is σ = 9499392000. Its totient is φ = 620006400.

The previous prime is 2539807891. The next prime is 2539807951. The reversal of 2539807920 is 297089352.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 4239781 + ... + 4240379.

It is an arithmetic number, because the mean of its divisors is an integer number (29685600).

Almost surely, 2^2539807920 is an apocalyptic number.

2539807920 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 2539807920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4749696000).

2539807920 is an abundant number, since it is smaller than the sum of its proper divisors (6959584080).

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

2539807920 is a wasteful number, since it uses less digits than its factorization.

2539807920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 785 (or 773 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 45.

The square root of 2539807920 is about 50396.5070218165. The cubic root of 2539807920 is about 1364.3745957619.

The spelling of 2539807920 in words is "two billion, five hundred thirty-nine million, eight hundred seven thousand, nine hundred twenty".