751225728 has 128 divisors (see below), whose sum is σ = 2247459840. Its totient is φ = 220262400.

The previous prime is 751225687. The next prime is 751225757. The reversal of 751225728 is 827522157.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 128076 + ... + 133812.

It is an arithmetic number, because the mean of its divisors is an integer number (17558280).

Almost surely, 2^751225728 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 751225728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1123729920).

751225728 is an abundant number, since it is smaller than the sum of its proper divisors (1496234112).

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

751225728 is a wasteful number, since it uses less digits than its factorization.

751225728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5796 (or 5784 counting only the distinct ones).

The product of its digits is 78400, while the sum is 39.

The square root of 751225728 is about 27408.4973685169. The cubic root of 751225728 is about 909.0549816008.

The spelling of 751225728 in words is "seven hundred fifty-one million, two hundred twenty-five thousand, seven hundred twenty-eight".