145905238 has 8 divisors (see below), whose sum is σ = 228373488. Its totient is φ = 69780744.

The previous prime is 145905233. The next prime is 145905247. The reversal of 145905238 is 832509541.

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

It is a junction number, because it is equal to n+sod(n) for n = 145905197 and 145905206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145905233) 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, 1585881 + ... + 1585972.

It is an arithmetic number, because the mean of its divisors is an integer number (28546686).

Almost surely, 2^145905238 is an apocalyptic number.

145905238 is a deficient number, since it is larger than the sum of its proper divisors (82468250).

145905238 is a wasteful number, since it uses less digits than its factorization.

145905238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3171878.

The product of its (nonzero) digits is 43200, while the sum is 37.

The square root of 145905238 is about 12079.1240576459. The cubic root of 145905238 is about 526.4497952536.

The spelling of 145905238 in words is "one hundred forty-five million, nine hundred five thousand, two hundred thirty-eight".