7428685388 has 24 divisors (see below), whose sum is σ = 13041369600. Its totient is φ = 3702600720.

The previous prime is 7428685361. The next prime is 7428685421. The reversal of 7428685388 is 8835868247.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1941245 + ... + 1945067.

It is an arithmetic number, because the mean of its divisors is an integer number (543390400).

Almost surely, 2^7428685388 is an apocalyptic number.

It is an amenable number.

7428685388 is a deficient number, since it is larger than the sum of its proper divisors (5612684212).

7428685388 is a wasteful number, since it uses less digits than its factorization.

7428685388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5237 (or 5235 counting only the distinct ones).

The product of its digits is 20643840, while the sum is 59.

The square root of 7428685388 is about 86189.8218352956. The cubic root of 7428685388 is about 1951.2098902299.

The spelling of 7428685388 in words is "seven billion, four hundred twenty-eight million, six hundred eighty-five thousand, three hundred eighty-eight".