73218750 has 112 divisors (see below), whose sum is σ = 202497408. Its totient is φ = 17500000.

The previous prime is 73218737. The next prime is 73218757. The reversal of 73218750 is 5781237.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73218757) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 1031215 + ... + 1031285.

Almost surely, 2^73218750 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73218750, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101248704).

73218750 is an abundant number, since it is smaller than the sum of its proper divisors (129278658).

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

73218750 is an equidigital number, since it uses as much as digits as its factorization.

73218750 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117 (or 92 counting only the distinct ones).

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 73218750 is about 8556.7955450624. The cubic root of 73218750 is about 418.3509601768.

Adding to 73218750 its reverse (5781237), we get a palindrome (78999987).

It can be divided in two parts, 732187 and 50, that added together give a palindrome (732237).

The spelling of 73218750 in words is "seventy-three million, two hundred eighteen thousand, seven hundred fifty".