2405778 has 8 divisors (see below), whose sum is σ = 4811568. Its totient is φ = 801924.

The previous prime is 2405773. The next prime is 2405791. The reversal of 2405778 is 8775042.

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

2405778 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (2405773) 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, 200476 + ... + 200487.

It is an arithmetic number, because the mean of its divisors is an integer number (601446).

2^2405778 is an apocalyptic number.

2405778 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.

2405778 is a wasteful number, since it uses less digits than its factorization.

2405778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400968.

The product of its (nonzero) digits is 15680, while the sum is 33.

The square root of 2405778 is about 1551.0570589118. The cubic root of 2405778 is about 133.9939478963.

The spelling of 2405778 in words is "two million, four hundred five thousand, seven hundred seventy-eight".