145891280 has 40 divisors (see below), whose sum is σ = 359153352. Its totient is φ = 54923264.

The previous prime is 145891279. The next prime is 145891307. The reversal of 145891280 is 82198541.

It can be written as a sum of positive squares in 4 ways, for example, as 4376464 + 141514816 = 2092^2 + 11896^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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 7 ways as a sum of consecutive naturals, for example, 52277 + ... + 54996.

Almost surely, 2^145891280 is an apocalyptic number.

145891280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

145891280 is an abundant number, since it is smaller than the sum of its proper divisors (213262072).

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

145891280 is a wasteful number, since it uses less digits than its factorization.

145891280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 107303 (or 107297 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 38.

The square root of 145891280 is about 12078.5462701436. The cubic root of 145891280 is about 526.4330071412.

The spelling of 145891280 in words is "one hundred forty-five million, eight hundred ninety-one thousand, two hundred eighty".