73021424 has 80 divisors (see below), whose sum is σ = 169179648. Its totient is φ = 29880576.

The previous prime is 73021393. The next prime is 73021433. The reversal of 73021424 is 42412037.

It is a self number, because there is not a number n which added to its sum of digits gives 73021424.

It is a congruent number.

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, 277517 + ... + 277779.

Almost surely, 2^73021424 is an apocalyptic number.

73021424 is a gapful number since it is divisible by the number (74) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 73021424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84589824).

73021424 is an abundant number, since it is smaller than the sum of its proper divisors (96158224).

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

73021424 is a wasteful number, since it uses less digits than its factorization.

73021424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 382 (or 376 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 73021424 is about 8545.2573981127. The cubic root of 73021424 is about 417.9748006450.

The spelling of 73021424 in words is "seventy-three million, twenty-one thousand, four hundred twenty-four".