73817980 has 12 divisors (see below), whose sum is σ = 155017800. Its totient is φ = 29527184.

The previous prime is 73817977. The next prime is 73818001. The reversal of 73817980 is 8971837.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1845430 + ... + 1845469.

It is an arithmetic number, because the mean of its divisors is an integer number (12918150).

Almost surely, 2^73817980 is an apocalyptic number.

It is an amenable number.

73817980 is an abundant number, since it is smaller than the sum of its proper divisors (81199820).

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

73817980 is a wasteful number, since it uses less digits than its factorization.

73817980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3690908 (or 3690906 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 43.

The square root of 73817980 is about 8591.7390556278. The cubic root of 73817980 is about 419.4891369941.

The spelling of 73817980 in words is "seventy-three million, eight hundred seventeen thousand, nine hundred eighty".