73218992 has 80 divisors (see below), whose sum is σ = 178893312. Its totient is φ = 28200960.

The previous prime is 73218953. The next prime is 73219019. The reversal of 73218992 is 29981237.

It is a happy number.

It is a super-2 number, since 2×73218992² = 10722041578992128, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126608 + ... + 127184.

Almost surely, 2^73218992 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 73218992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89446656).

73218992 is an abundant number, since it is smaller than the sum of its proper divisors (105674320).

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

73218992 is a wasteful number, since it uses less digits than its factorization.

73218992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 706 (or 700 counting only the distinct ones).

The product of its digits is 54432, while the sum is 41.

The square root of 73218992 is about 8556.8096858584. The cubic root of 73218992 is about 418.3514210825.

The spelling of 73218992 in words is "seventy-three million, two hundred eighteen thousand, nine hundred ninety-two".