73438220 has 24 divisors (see below), whose sum is σ = 154467600. Its totient is φ = 29328192.

The previous prime is 73438213. The next prime is 73438223. The reversal of 73438220 is 2283437.

It is not an unprimeable number, because it can be changed into a prime (73438223) 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, 11591 + ... + 16769.

It is an arithmetic number, because the mean of its divisors is an integer number (6436150).

Almost surely, 2^73438220 is an apocalyptic number.

It is an amenable number.

73438220 is an abundant number, since it is smaller than the sum of its proper divisors (81029380).

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

73438220 is a wasteful number, since it uses less digits than its factorization.

73438220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5897 (or 5895 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 29.

The square root of 73438220 is about 8569.6102595159. The cubic root of 73438220 is about 418.7685394628.

The spelling of 73438220 in words is "seventy-three million, four hundred thirty-eight thousand, two hundred twenty".