73998 has 12 divisors (see below), whose sum is σ = 160368. Its totient is φ = 24660.

The previous prime is 73973. The next prime is 73999. The reversal of 73998 is 89937.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73999) by changing a digit.

73998 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2038 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (13364).

2⁷³⁹⁹⁸ is an apocalyptic number.

73998 is an abundant number, since it is smaller than the sum of its proper divisors (86370).

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

73998 is a wasteful number, since it uses less digits than its factorization.

73998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4119 (or 4116 counting only the distinct ones).

The product of its digits is 13608, while the sum is 36.

The square root of 73998 is about 272.0257340768. The cubic root of 73998 is about 41.9829863062.

It can be divided in two parts, 7 and 3998, that added together give a triangular number (4005 = T₈₉).

The spelling of 73998 in words is "seventy-three thousand, nine hundred ninety-eight".