73998090 has 64 divisors (see below), whose sum is σ = 198374400. Its totient is φ = 19628352.

The previous prime is 73998079. The next prime is 73998091. The reversal of 73998090 is 9089937.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (73998091) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 59596 + ... + 60824.

It is an arithmetic number, because the mean of its divisors is an integer number (3099600).

Almost surely, 2^73998090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73998090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (99187200).

73998090 is an abundant number, since it is smaller than the sum of its proper divisors (124376310).

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

73998090 is a wasteful number, since it uses less digits than its factorization.

73998090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1468 (or 1462 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 45.

The square root of 73998090 is about 8602.2142498313. The cubic root of 73998090 is about 419.8300332675.

The spelling of 73998090 in words is "seventy-three million, nine hundred ninety-eight thousand, ninety".