144293738 has 4 divisors (see below), whose sum is σ = 216440610. Its totient is φ = 72146868.

The previous prime is 144293729. The next prime is 144293753. The reversal of 144293738 is 837392441.

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

It can be written as a sum of positive squares in only one way, i.e., 118962649 + 25331089 = 10907^2 + 5033^2 .

It is a super-3 number, since 3×144293738³ (a number of 25 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 144293695 and 144293704.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36073433 + ... + 36073436.

Almost surely, 2^144293738 is an apocalyptic number.

144293738 is a deficient number, since it is larger than the sum of its proper divisors (72146872).

144293738 is an equidigital number, since it uses as much as digits as its factorization.

144293738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72146871.

The product of its digits is 145152, while the sum is 41.

The square root of 144293738 is about 12012.2328482260. The cubic root of 144293738 is about 524.5044309230.

The spelling of 144293738 in words is "one hundred forty-four million, two hundred ninety-three thousand, seven hundred thirty-eight".