145818280 has 32 divisors (see below), whose sum is σ = 328501800. Its totient is φ = 58254336.

The previous prime is 145818247. The next prime is 145818287. The reversal of 145818280 is 82818541.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 123520996 + 22297284 = 11114^2 + 4722^2 .

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (145818287) 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, 39556 + ... + 43084.

Almost surely, 2^145818280 is an apocalyptic number.

145818280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145818280 is an abundant number, since it is smaller than the sum of its proper divisors (182683520).

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

145818280 is a wasteful number, since it uses less digits than its factorization.

145818280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4573 (or 4569 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 37.

The square root of 145818280 is about 12075.5240051933. The cubic root of 145818280 is about 526.3451882736.

The spelling of 145818280 in words is "one hundred forty-five million, eight hundred eighteen thousand, two hundred eighty".