145238028 has 24 divisors (see below), whose sum is σ = 364957488. Its totient is φ = 44688576.

The previous prime is 145238017. The next prime is 145238029. The reversal of 145238028 is 820832541.

It is a self number, because there is not a number n which added to its sum of digits gives 145238028.

It is not an unprimeable number, because it can be changed into a prime (145238029) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 465351 + ... + 465662.

It is an arithmetic number, because the mean of its divisors is an integer number (15206562).

Almost surely, 2^145238028 is an apocalyptic number.

It is an amenable number.

145238028 is an abundant number, since it is smaller than the sum of its proper divisors (219719460).

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

145238028 is a wasteful number, since it uses less digits than its factorization.

145238028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 931033 (or 931031 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 145238028 is about 12051.4741007065. The cubic root of 145238028 is about 525.6461015883.

The spelling of 145238028 in words is "one hundred forty-five million, two hundred thirty-eight thousand, twenty-eight".