7278231328 has 12 divisors (see below), whose sum is σ = 14329017990. Its totient is φ = 3639115648.

The previous prime is 7278231281. The next prime is 7278231329. The reversal of 7278231328 is 8231328727.

It can be written as a sum of positive squares in only one way, i.e., 7193075344 + 85155984 = 84812^2 + 9228^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (7278231329) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 113722333 + ... + 113722396.

Almost surely, 2^7278231328 is an apocalyptic number.

It is an amenable number.

7278231328 is a deficient number, since it is larger than the sum of its proper divisors (7050786662).

7278231328 is a wasteful number, since it uses less digits than its factorization.

7278231328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 227444739 (or 227444731 counting only the distinct ones).

The product of its digits is 225792, while the sum is 43.

The square root of 7278231328 is about 85312.5508234281. The cubic root of 7278231328 is about 1937.9472501895.

The spelling of 7278231328 in words is "seven billion, two hundred seventy-eight million, two hundred thirty-one thousand, three hundred twenty-eight".