145509798 has 32 divisors (see below), whose sum is σ = 334727424. Its totient is φ = 41307552.

The previous prime is 145509773. The next prime is 145509803. The reversal of 145509798 is 897905541.

145509798 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4440 + ... + 17627.

It is an arithmetic number, because the mean of its divisors is an integer number (10460232).

Almost surely, 2^145509798 is an apocalyptic number.

145509798 is an abundant number, since it is smaller than the sum of its proper divisors (189217626).

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

145509798 is a wasteful number, since it uses less digits than its factorization.

145509798 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22236.

The product of its (nonzero) digits is 453600, while the sum is 48.

The square root of 145509798 is about 12062.7442151444. The cubic root of 145509798 is about 525.9737610220.

The spelling of 145509798 in words is "one hundred forty-five million, five hundred nine thousand, seven hundred ninety-eight".