731278080 has 432 divisors, whose sum is σ = 2879341920. Its totient is φ = 169869312.

The previous prime is 731278073. The next prime is 731278087. The reversal of 731278080 is 80872137.

It is an interprime number because it is at equal distance from previous prime (731278073) and next prime (731278087).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (731278087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2845312 + ... + 2845568.

Almost surely, 2^731278080 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 731278080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1439670960).

731278080 is an abundant number, since it is smaller than the sum of its proper divisors (2148063840).

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

731278080 is a wasteful number, since it uses less digits than its factorization.

731278080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 299 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 731278080 is about 27042.1537603794. The cubic root of 731278080 is about 900.9365066494.

The spelling of 731278080 in words is "seven hundred thirty-one million, two hundred seventy-eight thousand, eighty".