145501980 has 96 divisors (see below), whose sum is σ = 464595264. Its totient is φ = 33705984.

The previous prime is 145501931. The next prime is 145501987. The reversal of 145501980 is 89105541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145501987) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 7774 + ... + 18746.

It is an arithmetic number, because the mean of its divisors is an integer number (4839534).

Almost surely, 2^145501980 is an apocalyptic number.

145501980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145501980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (232297632).

145501980 is an abundant number, since it is smaller than the sum of its proper divisors (319093284).

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

145501980 is a wasteful number, since it uses less digits than its factorization.

145501980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11015 (or 11013 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 33.

The square root of 145501980 is about 12062.4201551762. The cubic root of 145501980 is about 525.9643409542.

The spelling of 145501980 in words is "one hundred forty-five million, five hundred one thousand, nine hundred eighty".