145808 has 20 divisors (see below), whose sum is σ = 304668. Its totient is φ = 67200.

The previous prime is 145807. The next prime is 145819. The reversal of 145808 is 808541.

It can be written as a sum of positive squares in 2 ways, for example, as 73984 + 71824 = 272^2 + 268^2 .

It is a Harshad number since it is a multiple of its sum of digits (26).

It is not an unprimeable number, because it can be changed into a prime (145807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143 + ... + 558.

2¹⁴⁵⁸⁰⁸ is an apocalyptic number.

It is an amenable number.

145808 is an abundant number, since it is smaller than the sum of its proper divisors (158860).

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

145808 is a wasteful number, since it uses less digits than its factorization.

145808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 722 (or 716 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 26.

The square root of 145808 is about 381.8481373531. The cubic root of 145808 is about 52.6332819098.

The spelling of 145808 in words is "one hundred forty-five thousand, eight hundred eight".