2278415 has 4 divisors (see below), whose sum is σ = 2734104. Its totient is φ = 1822728.

The previous prime is 2278379. The next prime is 2278421. The reversal of 2278415 is 5148722.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2278415 - 2¹⁴ = 2262031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 227837 + ... + 227846.

It is an arithmetic number, because the mean of its divisors is an integer number (683526).

2^2278415 is an apocalyptic number.

2278415 is a deficient number, since it is larger than the sum of its proper divisors (455689).

2278415 is an equidigital number, since it uses as much as digits as its factorization.

2278415 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455688.

The product of its digits is 4480, while the sum is 29.

The square root of 2278415 is about 1509.4419498609. The cubic root of 2278415 is about 131.5863812923.

The spelling of 2278415 in words is "two million, two hundred seventy-eight thousand, four hundred fifteen".