144090638 has 8 divisors (see below), whose sum is σ = 216581232. Its totient is φ = 71896896.

The previous prime is 144090637. The next prime is 144090659. The reversal of 144090638 is 836090441.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×144090638² = 41524223918494088, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 144090598 and 144090607.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (144090631) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 72995 + ... + 74942.

It is an arithmetic number, because the mean of its divisors is an integer number (27072654).

Almost surely, 2^144090638 is an apocalyptic number.

144090638 is a deficient number, since it is larger than the sum of its proper divisors (72490594).

144090638 is a wasteful number, since it uses less digits than its factorization.

144090638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148426.

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 144090638 is about 12003.7759892461. The cubic root of 144090638 is about 524.2582274241.

The spelling of 144090638 in words is "one hundred forty-four million, ninety thousand, six hundred thirty-eight".