145439538 has 32 divisors (see below), whose sum is σ = 301056000. Its totient is φ = 46792080.

The previous prime is 145439537. The next prime is 145439551. The reversal of 145439538 is 835934541.

145439538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 145439538.

It is not an unprimeable number, because it can be changed into a prime (145439537) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 92031 + ... + 93597.

It is an arithmetic number, because the mean of its divisors is an integer number (9408000).

Almost surely, 2^145439538 is an apocalyptic number.

145439538 is an abundant number, since it is smaller than the sum of its proper divisors (155616462).

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

145439538 is a wasteful number, since it uses less digits than its factorization.

145439538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2102.

The product of its digits is 259200, while the sum is 42.

The square root of 145439538 is about 12059.8315908639. The cubic root of 145439538 is about 525.8890912003.

The spelling of 145439538 in words is "one hundred forty-five million, four hundred thirty-nine thousand, five hundred thirty-eight".