2478399 has 16 divisors (see below), whose sum is σ = 4120320. Its totient is φ = 1287360.

The previous prime is 2478373. The next prime is 2478403. The reversal of 2478399 is 9938742.

It is not a de Polignac number, because 2478399 - 2⁵ = 2478367 is a prime.

It is a super-2 number, since 2×2478399² = 12284923206402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2478399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5134 + ... + 5595.

It is an arithmetic number, because the mean of its divisors is an integer number (257520).

2^2478399 is an apocalyptic number.

2478399 is a deficient number, since it is larger than the sum of its proper divisors (1641921).

2478399 is a wasteful number, since it uses less digits than its factorization.

2478399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10750.

The product of its digits is 108864, while the sum is 42.

The square root of 2478399 is about 1574.2931747295. The cubic root of 2478399 is about 135.3288553338.

It can be divided in two parts, 247 and 8399, that added together give a triangular number (8646 = T₁₃₁).

The spelling of 2478399 in words is "two million, four hundred seventy-eight thousand, three hundred ninety-nine".