2478840 has 128 divisors (see below), whose sum is σ = 9192960. Its totient is φ = 520704.

The previous prime is 2478809. The next prime is 2478877. The reversal of 2478840 is 488742.

It is a super-2 number, since 2×2478840² = 12289295491200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10807 + ... + 11033.

It is an arithmetic number, because the mean of its divisors is an integer number (71820).

2^2478840 is an apocalyptic number.

2478840 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 2478840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4596480).

2478840 is an abundant number, since it is smaller than the sum of its proper divisors (6714120).

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

2478840 is a wasteful number, since it uses less digits than its factorization.

2478840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 257 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 2478840 is about 1574.4332313566. The cubic root of 2478840 is about 135.3368815483.

The spelling of 2478840 in words is "two million, four hundred seventy-eight thousand, eight hundred forty".