73145432 has 8 divisors (see below), whose sum is σ = 137147700. Its totient is φ = 36572712.

The previous prime is 73145393. The next prime is 73145447. The reversal of 73145432 is 23454137.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 73145395 and 73145404.

It is a congruent number.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 4571582 + ... + 4571597.

Almost surely, 2^73145432 is an apocalyptic number.

It is an amenable number.

73145432 is a deficient number, since it is larger than the sum of its proper divisors (64002268).

73145432 is a wasteful number, since it uses less digits than its factorization.

73145432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9143185 (or 9143181 counting only the distinct ones).

The product of its digits is 10080, while the sum is 29.

The square root of 73145432 is about 8552.5102747673. The cubic root of 73145432 is about 418.2112741925.

Adding to 73145432 its reverse (23454137), we get a palindrome (96599569).

The spelling of 73145432 in words is "seventy-three million, one hundred forty-five thousand, four hundred thirty-two".