145991382 has 8 divisors (see below), whose sum is σ = 291982776. Its totient is φ = 48663792.

The previous prime is 145991347. The next prime is 145991401. The reversal of 145991382 is 283199541.

It is a sphenic number, since it is the product of 3 distinct primes.

145991382 is an admirable number.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12165943 + ... + 12165954.

It is an arithmetic number, because the mean of its divisors is an integer number (36497847).

Almost surely, 2^145991382 is an apocalyptic number.

145991382 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

145991382 is a wasteful number, since it uses less digits than its factorization.

145991382 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24331902.

The product of its digits is 77760, while the sum is 42.

The square root of 145991382 is about 12082.6893529545. The cubic root of 145991382 is about 526.5533820509.

The spelling of 145991382 in words is "one hundred forty-five million, nine hundred ninety-one thousand, three hundred eighty-two".