73638381 has 8 divisors (see below), whose sum is σ = 98236800. Its totient is φ = 49066112.

The previous prime is 73638379. The next prime is 73638443. The reversal of 73638381 is 18383637.

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

It is a cyclic number.

It is not a de Polignac number, because 73638381 - 2¹ = 73638379 is a prime.

It is a super-3 number, since 3×73638381³ (a number of 25 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73638311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1420 + ... + 12218.

It is an arithmetic number, because the mean of its divisors is an integer number (12279600).

Almost surely, 2^73638381 is an apocalyptic number.

It is an amenable number.

73638381 is a deficient number, since it is larger than the sum of its proper divisors (24598419).

73638381 is a wasteful number, since it uses less digits than its factorization.

73638381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13075.

The product of its digits is 72576, while the sum is 39.

The square root of 73638381 is about 8581.2808484515. The cubic root of 73638381 is about 419.1486552994.

The spelling of 73638381 in words is "seventy-three million, six hundred thirty-eight thousand, three hundred eighty-one".