2478820 has 12 divisors (see below), whose sum is σ = 5205564. Its totient is φ = 991520.

The previous prime is 2478809. The next prime is 2478877. The reversal of 2478820 is 288742.

2478820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 1572516 + 906304 = 1254^2 + 952^2 .

It is a super-2 number, since 2×2478820² = 12289097184800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 61951 + ... + 61990.

It is an arithmetic number, because the mean of its divisors is an integer number (433797).

2^2478820 is an apocalyptic number.

2478820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2478820 is an abundant number, since it is smaller than the sum of its proper divisors (2726744).

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

2478820 is a wasteful number, since it uses less digits than its factorization.

2478820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 123950 (or 123948 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 2478820 is about 1574.4268798518. The cubic root of 2478820 is about 135.3365175682.

The spelling of 2478820 in words is "two million, four hundred seventy-eight thousand, eight hundred twenty".