2378665 has 8 divisors (see below), whose sum is σ = 2866248. Its totient is φ = 1895040.

The previous prime is 2378653. The next prime is 2378669. The reversal of 2378665 is 5668732.

It can be written as a sum of positive squares in 4 ways, for example, as 281961 + 2096704 = 531^2 + 1448^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 2378665 - 2⁵ = 2378633 is a prime.

It is a d-powerful number, because it can be written as 2¹⁰ + 3⁸ + 7⁵ + 8⁴ + 6⁷ + 6⁸ + 5⁸ .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2378669) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 559 + ... + 2251.

It is an arithmetic number, because the mean of its divisors is an integer number (358281).

2^2378665 is an apocalyptic number.

It is an amenable number.

2378665 is a deficient number, since it is larger than the sum of its proper divisors (487583).

2378665 is a wasteful number, since it uses less digits than its factorization.

2378665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1979.

The product of its digits is 60480, while the sum is 37.

The square root of 2378665 is about 1542.2921253770. The cubic root of 2378665 is about 133.4886765822.

The spelling of 2378665 in words is "two million, three hundred seventy-eight thousand, six hundred sixty-five".