145447918 has 16 divisors (see below), whose sum is σ = 272006784. Its totient is φ = 56667960.

The previous prime is 145447909. The next prime is 145447919. The reversal of 145447918 is 819744541.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145447919) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 472080 + ... + 472387.

It is an arithmetic number, because the mean of its divisors is an integer number (17000424).

Almost surely, 2^145447918 is an apocalyptic number.

145447918 is a deficient number, since it is larger than the sum of its proper divisors (126558866).

145447918 is a wasteful number, since it uses less digits than its factorization.

145447918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 944487.

The product of its digits is 161280, while the sum is 43.

The square root of 145447918 is about 12060.1790202302. The cubic root of 145447918 is about 525.8991913101.

The spelling of 145447918 in words is "one hundred forty-five million, four hundred forty-seven thousand, nine hundred eighteen".