1144988778 has 16 divisors (see below), whose sum is σ = 2343233376. Its totient is φ = 372786960.

The previous prime is 1144988753. The next prime is 1144988797. The reversal of 1144988778 is 8778894411.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2218713 + ... + 2219228.

It is an arithmetic number, because the mean of its divisors is an integer number (146452086).

Almost surely, 2^1144988778 is an apocalyptic number.

1144988778 is an abundant number, since it is smaller than the sum of its proper divisors (1198244598).

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

1144988778 is a wasteful number, since it uses less digits than its factorization.

1144988778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4437989.

The product of its digits is 3612672, while the sum is 57.

The square root of 1144988778 is about 33837.6828107363. The cubic root of 1144988778 is about 1046.1655388169.

The spelling of 1144988778 in words is "one billion, one hundred forty-four million, nine hundred eighty-eight thousand, seven hundred seventy-eight".