145729428 has 48 divisors (see below), whose sum is σ = 367053120. Its totient is φ = 44734464.

The previous prime is 145729391. The next prime is 145729453. The reversal of 145729428 is 824927541.

It is a self number, because there is not a number n which added to its sum of digits gives 145729428.

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, 89203 + ... + 90821.

It is an arithmetic number, because the mean of its divisors is an integer number (7646940).

Almost surely, 2^145729428 is an apocalyptic number.

It is an amenable number.

145729428 is an abundant number, since it is smaller than the sum of its proper divisors (221323692).

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

145729428 is a wasteful number, since it uses less digits than its factorization.

145729428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2216 (or 2214 counting only the distinct ones).

The product of its digits is 161280, while the sum is 42.

The square root of 145729428 is about 12071.8444323972. The cubic root of 145729428 is about 526.2382599224.

The spelling of 145729428 in words is "one hundred forty-five million, seven hundred twenty-nine thousand, four hundred twenty-eight".