144839778 has 16 divisors (see below), whose sum is σ = 295145856. Its totient is φ = 47368880.

The previous prime is 144839743. The next prime is 144839791. The reversal of 144839778 is 877938441.

It is a super-2 number, since 2×144839778² = 41957122582178568, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 144839778.

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, 227418 + ... + 228053.

It is an arithmetic number, because the mean of its divisors is an integer number (18446616).

Almost surely, 2^144839778 is an apocalyptic number.

144839778 is an abundant number, since it is smaller than the sum of its proper divisors (150306078).

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

144839778 is a wasteful number, since it uses less digits than its factorization.

144839778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455529.

The product of its digits is 1354752, while the sum is 51.

The square root of 144839778 is about 12034.9398835225. The cubic root of 144839778 is about 525.1652124029.

The spelling of 144839778 in words is "one hundred forty-four million, eight hundred thirty-nine thousand, seven hundred seventy-eight".