2258778 has 8 divisors (see below), whose sum is σ = 4517568. Its totient is φ = 752924.

The previous prime is 2258743. The next prime is 2258779. The reversal of 2258778 is 8778522.

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

2258778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2258779) 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, 188226 + ... + 188237.

It is an arithmetic number, because the mean of its divisors is an integer number (564696).

2^2258778 is an apocalyptic number.

2258778 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2258778 is a wasteful number, since it uses less digits than its factorization.

2258778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 376468.

The product of its digits is 62720, while the sum is 39.

The square root of 2258778 is about 1502.9231517280. The cubic root of 2258778 is about 131.2072550147.

The spelling of 2258778 in words is "two million, two hundred fifty-eight thousand, seven hundred seventy-eight".