2378778 has 16 divisors (see below), whose sum is σ = 4823616. Its totient is φ = 781920.

The previous prime is 2378773. The next prime is 2378791. The reversal of 2378778 is 8778732.

It is a d-powerful number, because it can be written as 2¹⁷ + 3⁴ + 7 + 8⁵ + 7² + 7⁶ + 8⁷ .

It is not an unprimeable number, because it can be changed into a prime (2378771) 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, 2278 + ... + 3153.

It is an arithmetic number, because the mean of its divisors is an integer number (301476).

2^2378778 is an apocalyptic number.

2378778 is an abundant number, since it is smaller than the sum of its proper divisors (2444838).

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

2378778 is a wasteful number, since it uses less digits than its factorization.

2378778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509.

The product of its digits is 131712, while the sum is 42.

The square root of 2378778 is about 1542.3287587282. The cubic root of 2378778 is about 133.4907903703.

The spelling of 2378778 in words is "two million, three hundred seventy-eight thousand, seven hundred seventy-eight".