73717380 has 144 divisors (see below), whose sum is σ = 252016128. Its totient is φ = 17280000.

The previous prime is 73717339. The next prime is 73717403. The reversal of 73717380 is 8371737.

It is a happy number.

It is a super-2 number, since 2×73717380² = 10868504228128800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 60780 + ... + 61980.

It is an arithmetic number, because the mean of its divisors is an integer number (1750112).

Almost surely, 2^73717380 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73717380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126008064).

73717380 is an abundant number, since it is smaller than the sum of its proper divisors (178298748).

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

73717380 is a wasteful number, since it uses less digits than its factorization.

73717380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1258 (or 1253 counting only the distinct ones).

The product of its (nonzero) digits is 24696, while the sum is 36.

The square root of 73717380 is about 8585.8825987781. The cubic root of 73717380 is about 419.2984888069.

The spelling of 73717380 in words is "seventy-three million, seven hundred seventeen thousand, three hundred eighty".