1398128008 has 32 divisors (see below), whose sum is σ = 2792361600. Its totient is φ = 653992192.

The previous prime is 1398127963. The next prime is 1398128033. The reversal of 1398128008 is 8008218931.

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, 8068 + ... + 53491.

It is an arithmetic number, because the mean of its divisors is an integer number (87261300).

Almost surely, 2^1398128008 is an apocalyptic number.

It is an amenable number.

1398128008 is a deficient number, since it is larger than the sum of its proper divisors (1394233592).

1398128008 is a wasteful number, since it uses less digits than its factorization.

1398128008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61749 (or 61745 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 40.

The square root of 1398128008 is about 37391.5499545018. The cubic root of 1398128008 is about 1118.1901061660.

The spelling of 1398128008 in words is "one billion, three hundred ninety-eight million, one hundred twenty-eight thousand, eight".