73408181 has 16 divisors (see below), whose sum is σ = 93654528. Its totient is φ = 55868400.

The previous prime is 73408177. The next prime is 73408189. The reversal of 73408181 is 18180437.

It is not a de Polignac number, because 73408181 - 2² = 73408177 is a prime.

It is a super-2 number, since 2×73408181² = 10777522075457522, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73408189) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7775 + ... + 14396.

It is an arithmetic number, because the mean of its divisors is an integer number (5853408).

Almost surely, 2^73408181 is an apocalyptic number.

It is an amenable number.

73408181 is a deficient number, since it is larger than the sum of its proper divisors (20246347).

73408181 is a wasteful number, since it uses less digits than its factorization.

73408181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22232.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 73408181 is about 8567.8574334544. The cubic root of 73408181 is about 418.7114343038.

The spelling of 73408181 in words is "seventy-three million, four hundred eight thousand, one hundred eighty-one".