2539980 has 72 divisors (see below), whose sum is σ = 7836192. Its totient is φ = 665856.

The previous prime is 2539963. The next prime is 2539981. The reversal of 2539980 is 899352.

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

It is not an unprimeable number, because it can be changed into a prime (2539981) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 18472 + ... + 18608.

It is an arithmetic number, because the mean of its divisors is an integer number (108836).

2^2539980 is an apocalyptic number.

2539980 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 2539980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3918096).

2539980 is an abundant number, since it is smaller than the sum of its proper divisors (5296212).

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

2539980 is a wasteful number, since it uses less digits than its factorization.

2539980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The square root of 2539980 is about 1593.7314704805. The cubic root of 2539980 is about 136.4405408627.

The spelling of 2539980 in words is "two million, five hundred thirty-nine thousand, nine hundred eighty".