2657988 has 24 divisors (see below), whose sum is σ = 6891360. Its totient is φ = 885960.

The previous prime is 2657951. The next prime is 2657999. The reversal of 2657988 is 8897562.

2657988 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a super-3 number, since 3×2657988³ = 56335259923332762816, which contains 333 as substring.

It is an Ulam number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12198 + ... + 12413.

It is an arithmetic number, because the mean of its divisors is an integer number (287140).

2^2657988 is an apocalyptic number.

It is an amenable number.

2657988 is an abundant number, since it is smaller than the sum of its proper divisors (4233372).

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

2657988 is a wasteful number, since it uses less digits than its factorization.

2657988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24624 (or 24616 counting only the distinct ones).

The product of its digits is 241920, while the sum is 45.

The square root of 2657988 is about 1630.3337081714. Note that the first 3 decimals coincide. The cubic root of 2657988 is about 138.5216550916.

The spelling of 2657988 in words is "two million, six hundred fifty-seven thousand, nine hundred eighty-eight".