145730020 has 12 divisors (see below), whose sum is σ = 306033084. Its totient is φ = 58292000.

The previous prime is 145730003. The next prime is 145730021. The reversal of 145730020 is 20037541.

It can be written as a sum of positive squares in 2 ways, for example, as 85636516 + 60093504 = 9254^2 + 7752^2 .

It is a junction number, because it is equal to n+sod(n) for n = 145729973 and 145730000.

It is not an unprimeable number, because it can be changed into a prime (145730021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3643231 + ... + 3643270.

It is an arithmetic number, because the mean of its divisors is an integer number (25502757).

Almost surely, 2^145730020 is an apocalyptic number.

145730020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145730020 is an abundant number, since it is smaller than the sum of its proper divisors (160303064).

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

145730020 is a wasteful number, since it uses less digits than its factorization.

145730020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7286510 (or 7286508 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 22.

The square root of 145730020 is about 12071.8689522377. The cubic root of 145730020 is about 526.2389725047.

Adding to 145730020 its reverse (20037541), we get a palindrome (165767561).

The spelling of 145730020 in words is "one hundred forty-five million, seven hundred thirty thousand, twenty".