749278528 has 56 divisors (see below), whose sum is σ = 1569110400. Its totient is φ = 354014208.

The previous prime is 749278511. The next prime is 749278529. The reversal of 749278528 is 825872947.

It is a happy number.

It is a super-2 number, since 2×749278528² = 1122836625043693568, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (749278529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 873876 + ... + 874732.

Almost surely, 2^749278528 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 749278528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (784555200).

749278528 is an abundant number, since it is smaller than the sum of its proper divisors (819831872).

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

749278528 is a wasteful number, since it uses less digits than its factorization.

749278528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1607 (or 1597 counting only the distinct ones).

The product of its digits is 2257920, while the sum is 52.

The square root of 749278528 is about 27372.9524896384. The cubic root of 749278528 is about 908.2688692535.

The spelling of 749278528 in words is "seven hundred forty-nine million, two hundred seventy-eight thousand, five hundred twenty-eight".