2478365 has 12 divisors (see below), whose sum is σ = 3112284. Its totient is φ = 1894464.

The previous prime is 2478361. The next prime is 2478367. The reversal of 2478365 is 5638742.

2478365 = 86² + 87² + ... + 200².

It is a happy number.

2478365 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 444889 + 2033476 = 667^2 + 1426^2 .

It is not a de Polignac number, because 2478365 - 2² = 2478361 is a prime.

It is a super-2 number, since 2×2478365² = 12284586146450, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹⁹ + 4³ + 7³ + 8³ + 3³ + 6 + 5⁹ .

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2478361) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2177 + ... + 3113.

It is an arithmetic number, because the mean of its divisors is an integer number (259357).

2^2478365 is an apocalyptic number.

It is an amenable number.

2478365 is a deficient number, since it is larger than the sum of its proper divisors (633919).

2478365 is an equidigital number, since it uses as much as digits as its factorization.

2478365 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 988 (or 965 counting only the distinct ones).

The product of its digits is 40320, while the sum is 35.

The square root of 2478365 is about 1574.2823761956. The cubic root of 2478365 is about 135.3282364931.

The spelling of 2478365 in words is "two million, four hundred seventy-eight thousand, three hundred sixty-five".