73721344 has 40 divisors (see below), whose sum is σ = 148515048. Its totient is φ = 36556800.

The previous prime is 73721339. The next prime is 73721363. The reversal of 73721344 is 44312737.

It is a super-2 number, since 2×73721344² = 10869673122332672, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 69619 + ... + 70669.

Almost surely, 2^73721344 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 73721344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (74257524).

73721344 is an abundant number, since it is smaller than the sum of its proper divisors (74793704).

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

73721344 is a wasteful number, since it uses less digits than its factorization.

73721344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206 (or 1190 counting only the distinct ones).

The product of its digits is 14112, while the sum is 31.

The square root of 73721344 is about 8586.1134397351. The cubic root of 73721344 is about 419.3060043092.

The spelling of 73721344 in words is "seventy-three million, seven hundred twenty-one thousand, three hundred forty-four".