7745331428 has 12 divisors (see below), whose sum is σ = 13674280620. Its totient is φ = 3838394112.

The previous prime is 7745331409. The next prime is 7745331439. The reversal of 7745331428 is 8241335477.

It can be written as a sum of positive squares in 2 ways, for example, as 1885122724 + 5860208704 = 43418^2 + 76552^2 .

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, 8567393 + ... + 8568296.

It is an arithmetic number, because the mean of its divisors is an integer number (1139523385).

Almost surely, 2^7745331428 is an apocalyptic number.

It is an amenable number.

7745331428 is a deficient number, since it is larger than the sum of its proper divisors (5928949192).

7745331428 is a wasteful number, since it uses less digits than its factorization.

7745331428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17135806 (or 17135804 counting only the distinct ones).

The product of its digits is 564480, while the sum is 44.

The square root of 7745331428 is about 88007.5646066859. The cubic root of 7745331428 is about 1978.5483550877.

The spelling of 7745331428 in words is "seven billion, seven hundred forty-five million, three hundred thirty-one thousand, four hundred twenty-eight".