2478660 has 48 divisors (see below), whose sum is σ = 7022400. Its totient is φ = 653184.

The previous prime is 2478653. The next prime is 2478661. The reversal of 2478660 is 668742.

It is a super-2 number, since 2×2478660² = 12287510791200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2478661) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6351 + ... + 6729.

It is an arithmetic number, because the mean of its divisors is an integer number (146300).

2^2478660 is an apocalyptic number.

2478660 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 2478660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3511200).

2478660 is an abundant number, since it is smaller than the sum of its proper divisors (4543740).

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

2478660 is a wasteful number, since it uses less digits than its factorization.

2478660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 500 (or 498 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 2478660 is about 1574.3760668913. The cubic root of 2478660 is about 135.3336056573. Note that the first 3 decimals are identical.

The spelling of 2478660 in words is "two million, four hundred seventy-eight thousand, six hundred sixty".