145728458 has 16 divisors (see below), whose sum is σ = 226109184. Its totient is φ = 70368480.

The previous prime is 145728449. The next prime is 145728469. The reversal of 145728458 is 854827541.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31766 + ... + 36062.

It is an arithmetic number, because the mean of its divisors is an integer number (14131824).

Almost surely, 2^145728458 is an apocalyptic number.

145728458 is a deficient number, since it is larger than the sum of its proper divisors (80380726).

145728458 is a wasteful number, since it uses less digits than its factorization.

145728458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4877.

The product of its digits is 358400, while the sum is 44.

The square root of 145728458 is about 12071.8042561997. The cubic root of 145728458 is about 526.2370923426.

The spelling of 145728458 in words is "one hundred forty-five million, seven hundred twenty-eight thousand, four hundred fifty-eight".