73806140 has 12 divisors (see below), whose sum is σ = 154992936. Its totient is φ = 29522448.

The previous prime is 73806119. The next prime is 73806143. The reversal of 73806140 is 4160837.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73806143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845134 + ... + 1845173.

It is an arithmetic number, because the mean of its divisors is an integer number (12916078).

Almost surely, 2^73806140 is an apocalyptic number.

It is an amenable number.

73806140 is an abundant number, since it is smaller than the sum of its proper divisors (81186796).

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

73806140 is a wasteful number, since it uses less digits than its factorization.

73806140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690316 (or 3690314 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 29.

The square root of 73806140 is about 8591.0499940345. The cubic root of 73806140 is about 419.4667078742.

Adding to 73806140 its reverse (4160837), we get a palindrome (77966977).

The spelling of 73806140 in words is "seventy-three million, eight hundred six thousand, one hundred forty".