1118630728 has 8 divisors (see below), whose sum is σ = 2097432630. Its totient is φ = 559315360.

The previous prime is 1118630713. The next prime is 1118630741. The reversal of 1118630728 is 8270368111.

It can be written as a sum of positive squares in only one way, i.e., 979815204 + 138815524 = 31302^2 + 11782^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69914413 + ... + 69914428.

Almost surely, 2^1118630728 is an apocalyptic number.

It is an amenable number.

1118630728 is a deficient number, since it is larger than the sum of its proper divisors (978801902).

1118630728 is a wasteful number, since it uses less digits than its factorization.

1118630728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139828847 (or 139828843 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 37.

The square root of 1118630728 is about 33445.9373915577. The cubic root of 1118630728 is about 1038.0754372628.

Adding to 1118630728 its reverse (8270368111), we get a palindrome (9388998839).

It can be divided in two parts, 11186 and 30728, that added together give a palindrome (41914).

The spelling of 1118630728 in words is "one billion, one hundred eighteen million, six hundred thirty thousand, seven hundred twenty-eight".