73909136 has 40 divisors (see below), whose sum is σ = 166757184. Its totient is φ = 31075200.

The previous prime is 73909127. The next prime is 73909141. The reversal of 73909136 is 63190937.

It is a self number, because there is not a number n which added to its sum of digits gives 73909136.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 290 + ... + 12161.

Almost surely, 2^73909136 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 73909136, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83378592).

73909136 is an abundant number, since it is smaller than the sum of its proper divisors (92848048).

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

73909136 is a wasteful number, since it uses less digits than its factorization.

73909136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519 (or 12513 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 38.

The square root of 73909136 is about 8597.0422820875. The cubic root of 73909136 is about 419.6617382241.

The spelling of 73909136 in words is "seventy-three million, nine hundred nine thousand, one hundred thirty-six".