145457228 has 24 divisors (see below), whose sum is σ = 296406432. Its totient is φ = 61161984.

The previous prime is 145457209. The next prime is 145457233. The reversal of 145457228 is 822754541.

It is a junction number, because it is equal to n+sod(n) for n = 145457191 and 145457200.

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, 47525 + ... + 50492.

It is an arithmetic number, because the mean of its divisors is an integer number (12350268).

Almost surely, 2^145457228 is an apocalyptic number.

It is an amenable number.

145457228 is an abundant number, since it is smaller than the sum of its proper divisors (150949204).

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

145457228 is a wasteful number, since it uses less digits than its factorization.

145457228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98081 (or 98079 counting only the distinct ones).

The product of its digits is 89600, while the sum is 38.

The square root of 145457228 is about 12060.5649950572. The cubic root of 145457228 is about 525.9104118604.

The spelling of 145457228 in words is "one hundred forty-five million, four hundred fifty-seven thousand, two hundred twenty-eight".