145404238 has 8 divisors (see below), whose sum is σ = 249264432. Its totient is φ = 62316096.

The previous prime is 145404223. The next prime is 145404239. The reversal of 145404238 is 832404541.

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

It is a super-2 number, since 2×145404238² = 42284784856721288, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145404239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5192995 + ... + 5193022.

It is an arithmetic number, because the mean of its divisors is an integer number (31158054).

Almost surely, 2^145404238 is an apocalyptic number.

145404238 is a deficient number, since it is larger than the sum of its proper divisors (103860194).

145404238 is a wasteful number, since it uses less digits than its factorization.

145404238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10386026.

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 145404238 is about 12058.3679658567. The cubic root of 145404238 is about 525.8465411315.

Adding to 145404238 its reverse (832404541), we get a palindrome (977808779).

The spelling of 145404238 in words is "one hundred forty-five million, four hundred four thousand, two hundred thirty-eight".