144220838 has 4 divisors (see below), whose sum is σ = 216331260. Its totient is φ = 72110418.

The previous prime is 144220831. The next prime is 144220847. The reversal of 144220838 is 838022441.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×144220838² = 41599300226844488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144220831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36055208 + ... + 36055211.

It is an arithmetic number, because the mean of its divisors is an integer number (54082815).

Almost surely, 2^144220838 is an apocalyptic number.

144220838 is a deficient number, since it is larger than the sum of its proper divisors (72110422).

144220838 is an equidigital number, since it uses as much as digits as its factorization.

144220838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72110421.

The product of its (nonzero) digits is 12288, while the sum is 32.

The square root of 144220838 is about 12009.1980581553. The cubic root of 144220838 is about 524.4160861004.

The spelling of 144220838 in words is "one hundred forty-four million, two hundred twenty thousand, eight hundred thirty-eight".