73921020 has 96 divisors (see below), whose sum is σ = 221652480. Its totient is φ = 18351360.

The previous prime is 73921013. The next prime is 73921069. The reversal of 73921020 is 2012937.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69009 + ... + 70071.

It is an arithmetic number, because the mean of its divisors is an integer number (2308880).

Almost surely, 2^73921020 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 73921020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110826240).

73921020 is an abundant number, since it is smaller than the sum of its proper divisors (147731460).

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

73921020 is a wasteful number, since it uses less digits than its factorization.

73921020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1155 (or 1153 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 24.

The square root of 73921020 is about 8597.7334222457. The cubic root of 73921020 is about 419.6842297729.

Adding to 73921020 its reverse (2012937), we get a palindrome (75933957).

The spelling of 73921020 in words is "seventy-three million, nine hundred twenty-one thousand, twenty".