73531780 has 48 divisors (see below), whose sum is σ = 176964480. Its totient is φ = 25141248.

The previous prime is 73531739. The next prime is 73531781. The reversal of 73531780 is 8713537.

It is not an unprimeable number, because it can be changed into a prime (73531781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95236 + ... + 96004.

It is an arithmetic number, because the mean of its divisors is an integer number (3686760).

Almost surely, 2^73531780 is an apocalyptic number.

73531780 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

73531780 is an abundant number, since it is smaller than the sum of its proper divisors (103432700).

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

73531780 is a wasteful number, since it uses less digits than its factorization.

73531780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1468 (or 1466 counting only the distinct ones).

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 73531780 is about 8575.0673466743. The cubic root of 73531780 is about 418.9463004795.

The spelling of 73531780 in words is "seventy-three million, five hundred thirty-one thousand, seven hundred eighty".