144649978 has 16 divisors (see below), whose sum is σ = 239047200. Its totient is φ = 65098000.

The previous prime is 144649969. The next prime is 144649987. The reversal of 144649978 is 879946441.

It is an interprime number because it is at equal distance from previous prime (144649969) and next prime (144649987).

It is a super-2 number, since 2×144649978² = 41847232270800968, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30328 + ... + 34771.

It is an arithmetic number, because the mean of its divisors is an integer number (14940450).

Almost surely, 2^144649978 is an apocalyptic number.

144649978 is a deficient number, since it is larger than the sum of its proper divisors (94397222).

144649978 is a wasteful number, since it uses less digits than its factorization.

144649978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65213.

The product of its digits is 1741824, while the sum is 52.

The square root of 144649978 is about 12027.0519247237. The cubic root of 144649978 is about 524.9357176018.

It can be divided in two parts, 14464 and 9978, that added together give a palindrome (24442).

The spelling of 144649978 in words is "one hundred forty-four million, six hundred forty-nine thousand, nine hundred seventy-eight".