73215780 has 48 divisors (see below), whose sum is σ = 223642944. Its totient is φ = 17749120.

The previous prime is 73215763. The next prime is 73215817. The reversal of 73215780 is 8751237.

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54807 + ... + 56126.

It is an arithmetic number, because the mean of its divisors is an integer number (4659228).

Almost surely, 2^73215780 is an apocalyptic number.

It is an amenable number.

73215780 is an abundant number, since it is smaller than the sum of its proper divisors (150427164).

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

73215780 is a wasteful number, since it uses less digits than its factorization.

73215780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110956 (or 110954 counting only the distinct ones).

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

The square root of 73215780 is about 8556.6219970266. The cubic root of 73215780 is about 418.3453035239.

It can be divided in two parts, 732157 and 80, that added together give a palindrome (732237).

The spelling of 73215780 in words is "seventy-three million, two hundred fifteen thousand, seven hundred eighty".