145509438 has 16 divisors (see below), whose sum is σ = 292763520. Its totient is φ = 48212376.

The previous prime is 145509437. The next prime is 145509449. The reversal of 145509438 is 834905541.

It is a junction number, because it is equal to n+sod(n) for n = 145509396 and 145509405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (145509437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71608 + ... + 73611.

It is an arithmetic number, because the mean of its divisors is an integer number (18297720).

Almost surely, 2^145509438 is an apocalyptic number.

145509438 is an abundant number, since it is smaller than the sum of its proper divisors (147254082).

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

145509438 is a wasteful number, since it uses less digits than its factorization.

145509438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 145391.

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 145509438 is about 12062.7292931575. The cubic root of 145509438 is about 525.9733272581.

The spelling of 145509438 in words is "one hundred forty-five million, five hundred nine thousand, four hundred thirty-eight".