145724224 has 28 divisors (see below), whose sum is σ = 304393600. Its totient is φ = 69026688.

The previous prime is 145724219. The next prime is 145724231. The reversal of 145724224 is 422427541.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58704 + ... + 61135.

It is an arithmetic number, because the mean of its divisors is an integer number (10871200).

Almost surely, 2^145724224 is an apocalyptic number.

It is an amenable number.

145724224 is an abundant number, since it is smaller than the sum of its proper divisors (158669376).

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

145724224 is a wasteful number, since it uses less digits than its factorization.

145724224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119870 (or 119860 counting only the distinct ones).

The product of its digits is 17920, while the sum is 31.

The square root of 145724224 is about 12071.6288876025. The cubic root of 145724224 is about 526.2319958559.

The spelling of 145724224 in words is "one hundred forty-five million, seven hundred twenty-four thousand, two hundred twenty-four".