145223808 has 64 divisors (see below), whose sum is σ = 387028800. Its totient is φ = 48247808.

The previous prime is 145223807. The next prime is 145223867. The reversal of 145223808 is 808322541.

It is a tau number, because it is divible by the number of its divisors (64).

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (145223801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 195085 + ... + 195827.

It is an arithmetic number, because the mean of its divisors is an integer number (6047325).

Almost surely, 2^145223808 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 145223808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193514400).

145223808 is an abundant number, since it is smaller than the sum of its proper divisors (241804992).

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

145223808 is an equidigital number, since it uses as much as digits as its factorization.

145223808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1269 (or 1257 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 33.

The square root of 145223808 is about 12050.8841169435. The cubic root of 145223808 is about 525.6289459998.

The spelling of 145223808 in words is "one hundred forty-five million, two hundred twenty-three thousand, eight hundred eight".