73136440 has 96 divisors (see below), whose sum is σ = 184464000. Its totient is φ = 26058240.

The previous prime is 73136419. The next prime is 73136443. The reversal of 73136440 is 4463137.

It is a super-4 number, since 4×73136440⁴ (a number of 33 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 73136399 and 73136408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73136443) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 209386 + ... + 209734.

It is an arithmetic number, because the mean of its divisors is an integer number (1921500).

Almost surely, 2^73136440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73136440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92232000).

73136440 is an abundant number, since it is smaller than the sum of its proper divisors (111327560).

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

73136440 is a wasteful number, since it uses less digits than its factorization.

73136440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 400 counting only the distinct ones).

The product of its (nonzero) digits is 6048, while the sum is 28.

The square root of 73136440 is about 8551.9845650001. The cubic root of 73136440 is about 418.1941361440.

Adding to 73136440 its reverse (4463137), we get a palindrome (77599577).

The spelling of 73136440 in words is "seventy-three million, one hundred thirty-six thousand, four hundred forty".