73530990 has 80 divisors (see below), whose sum is σ = 212956128. Its totient is φ = 18097344.

The previous prime is 73530973. The next prime is 73530997. The reversal of 73530990 is 9903537.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73530997) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7039 + ... + 14021.

Almost surely, 2^73530990 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73530990, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106478064).

73530990 is an abundant number, since it is smaller than the sum of its proper divisors (139425138).

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

73530990 is a wasteful number, since it uses less digits than its factorization.

73530990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7015 (or 7006 counting only the distinct ones).

The product of its (nonzero) digits is 25515, while the sum is 36.

The square root of 73530990 is about 8575.0212827724. The cubic root of 73530990 is about 418.9448001361.

The spelling of 73530990 in words is "seventy-three million, five hundred thirty thousand, nine hundred ninety".