145340238 has 32 divisors (see below), whose sum is σ = 294115104. Its totient is φ = 47878272.

The previous prime is 145340227. The next prime is 145340263. The reversal of 145340238 is 832043541.

It is a super-2 number, since 2×145340238² = 42247569563793288, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 260656 + ... + 261212.

It is an arithmetic number, because the mean of its divisors is an integer number (9191097).

Almost surely, 2^145340238 is an apocalyptic number.

145340238 is an abundant number, since it is smaller than the sum of its proper divisors (148774866).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

145340238 is a wasteful number, since it uses less digits than its factorization.

145340238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 145340238 is about 12055.7139149865. The cubic root of 145340238 is about 525.7693789663.

Adding to 145340238 its reverse (832043541), we get a palindrome (977383779).

The spelling of 145340238 in words is "one hundred forty-five million, three hundred forty thousand, two hundred thirty-eight".