145728538 has 8 divisors (see below), whose sum is σ = 226130580. Its totient is φ = 70351680.

The previous prime is 145728523. The next prime is 145728547. The reversal of 145728538 is 835827541.

It can be written as a sum of positive squares in 2 ways, for example, as 138368169 + 7360369 = 11763^2 + 2713^2 .

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 = 145728494 and 145728503.

It is an unprimeable number.

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, 1256223 + ... + 1256338.

Almost surely, 2^145728538 is an apocalyptic number.

145728538 is a deficient number, since it is larger than the sum of its proper divisors (80402042).

145728538 is a wasteful number, since it uses less digits than its factorization.

145728538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2512592.

The product of its digits is 268800, while the sum is 43.

The square root of 145728538 is about 12071.8075697055. The cubic root of 145728538 is about 526.2371886380.

The spelling of 145728538 in words is "one hundred forty-five million, seven hundred twenty-eight thousand, five hundred thirty-eight".