2539988 has 12 divisors (see below), whose sum is σ = 4849152. Its totient is φ = 1154520.

The previous prime is 2539981. The next prime is 2539997. The reversal of 2539988 is 8899352.

It is a Harshad number since it is a multiple of its sum of digits (44), and also a Moran number because the ratio is a prime number: 57727 = 2539988 / (2 + 5 + 3 + 9 + 9 + 8 + 8).

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 28820 + ... + 28907.

It is an arithmetic number, because the mean of its divisors is an integer number (404096).

2^2539988 is an apocalyptic number.

It is an amenable number.

2539988 is a deficient number, since it is larger than the sum of its proper divisors (2309164).

2539988 is a wasteful number, since it uses less digits than its factorization.

2539988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57742 (or 57740 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 2539988 is about 1593.7339803116. The cubic root of 2539988 is about 136.4406841084.

The spelling of 2539988 in words is "two million, five hundred thirty-nine thousand, nine hundred eighty-eight".