1098599678 has 16 divisors (see below), whose sum is σ = 1798416000. Its totient is φ = 499167000.

The previous prime is 1098599629. The next prime is 1098599681. The reversal of 1098599678 is 8769958901.

It is a self number, because there is not a number n which added to its sum of digits gives 1098599678.

It is a congruent number.

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, 57653 + ... + 74303.

It is an arithmetic number, because the mean of its divisors is an integer number (112401000).

Almost surely, 2^1098599678 is an apocalyptic number.

1098599678 is a deficient number, since it is larger than the sum of its proper divisors (699816322).

1098599678 is a wasteful number, since it uses less digits than its factorization.

1098599678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19663.

The product of its (nonzero) digits is 9797760, while the sum is 62.

The square root of 1098599678 is about 33145.1305322516. The cubic root of 1098599678 is about 1031.8418917037.

The spelling of 1098599678 in words is "one billion, ninety-eight million, five hundred ninety-nine thousand, six hundred seventy-eight".