2261378 has 8 divisors (see below), whose sum is σ = 3876672. Its totient is φ = 969156.

The previous prime is 2261377. The next prime is 2261393. The reversal of 2261378 is 8731622.

It is a happy number.

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

It is a super-2 number, since 2×2261378² = 10227660917768, 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 2261378.

It is not an unprimeable number, because it can be changed into a prime (2261377) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80750 + ... + 80777.

It is an arithmetic number, because the mean of its divisors is an integer number (484584).

2^2261378 is an apocalyptic number.

2261378 is a deficient number, since it is larger than the sum of its proper divisors (1615294).

2261378 is a wasteful number, since it uses less digits than its factorization.

2261378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161536.

The product of its digits is 4032, while the sum is 29.

The square root of 2261378 is about 1503.7878839783. The cubic root of 2261378 is about 131.2575783984.

The spelling of 2261378 in words is "two million, two hundred sixty-one thousand, three hundred seventy-eight".