2378861 has 8 divisors (see below), whose sum is σ = 2580984. Its totient is φ = 2183680.

The previous prime is 2378843. The next prime is 2378869. The reversal of 2378861 is 1688732.

It can be written as a sum of positive squares in 4 ways, for example, as 609961 + 1768900 = 781^2 + 1330^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 2378861 - 2⁶ = 2378797 is a prime.

It is a d-powerful number, because it can be written as 2¹⁷ + 3 + 7⁶ + 8⁵ + 8⁷ + 6³ + 1 .

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2378869) 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, 1010 + ... + 2403.

It is an arithmetic number, because the mean of its divisors is an integer number (322623).

2^2378861 is an apocalyptic number.

It is an amenable number.

2378861 is a deficient number, since it is larger than the sum of its proper divisors (202123).

2378861 is a wasteful number, since it uses less digits than its factorization.

2378861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3471.

The product of its digits is 16128, while the sum is 35.

The square root of 2378861 is about 1542.3556658566. The cubic root of 2378861 is about 133.4923429331.

The spelling of 2378861 in words is "two million, three hundred seventy-eight thousand, eight hundred sixty-one".