73664438 has 8 divisors (see below), whose sum is σ = 111135888. Its totient is φ = 36619144.

The previous prime is 73664429. The next prime is 73664443. The reversal of 73664438 is 83446637.

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 73664395 and 73664404.

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, 106106 + ... + 106797.

It is an arithmetic number, because the mean of its divisors is an integer number (13891986).

Almost surely, 2^73664438 is an apocalyptic number.

73664438 is a deficient number, since it is larger than the sum of its proper divisors (37471450).

73664438 is a wasteful number, since it uses less digits than its factorization.

73664438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213078.

The product of its digits is 290304, while the sum is 41.

The square root of 73664438 is about 8582.7989607121. The cubic root of 73664438 is about 419.1980881648.

The spelling of 73664438 in words is "seventy-three million, six hundred sixty-four thousand, four hundred thirty-eight".