2577988 has 24 divisors (see below), whose sum is σ = 5264000. Its totient is φ = 1104264.

The previous prime is 2577947. The next prime is 2577989. The reversal of 2577988 is 8897752.

It is not an unprimeable number, because it can be changed into a prime (2577989) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 433 + ... + 2311.

2^2577988 is an apocalyptic number.

2577988 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 2577988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2632000).

2577988 is an abundant number, since it is smaller than the sum of its proper divisors (2686012).

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

2577988 is a wasteful number, since it uses less digits than its factorization.

2577988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1904 (or 1888 counting only the distinct ones).

The product of its digits is 282240, while the sum is 46.

The square root of 2577988 is about 1605.6114100242. The cubic root of 2577988 is about 137.1177349403.

The spelling of 2577988 in words is "two million, five hundred seventy-seven thousand, nine hundred eighty-eight".