73431360 has 140 divisors (see below), whose sum is σ = 261300468. Its totient is φ = 19574784.

The previous prime is 73431359. The next prime is 73431361. The reversal of 73431360 is 6313437.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (73431359) and next prime (73431361).

It can be written as a sum of positive squares in 2 ways, for example, as 27625536 + 45805824 = 5256^2 + 6768^2 .

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73431361) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 24504 + ... + 27336.

Almost surely, 2^73431360 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 73431360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (130650234).

73431360 is an abundant number, since it is smaller than the sum of its proper divisors (187869108).

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

73431360 is a wasteful number, since it uses less digits than its factorization.

73431360 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862 (or 2843 counting only the distinct ones).

The product of its (nonzero) digits is 4536, while the sum is 27.

The square root of 73431360 is about 8569.2099985938. The cubic root of 73431360 is about 418.7554997421.

Adding to 73431360 its reverse (6313437), we get a palindrome (79744797).

The spelling of 73431360 in words is "seventy-three million, four hundred thirty-one thousand, three hundred sixty".