11389758728 has 16 divisors (see below), whose sum is σ = 21361195260. Its totient is φ = 5693440000.

The previous prime is 11389758707. The next prime is 11389758749. The reversal of 11389758728 is 82785798311.

It is an interprime number because it is at equal distance from previous prime (11389758707) and next prime (11389758749).

It can be written as a sum of positive squares in 2 ways, for example, as 11350345444 + 39413284 = 106538^2 + 6278^2 .

It is a super-3 number, since 3×11389758728³ (a number of 31 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 145913 + ... + 209928.

Almost surely, 2^11389758728 is an apocalyptic number.

It is an amenable number.

11389758728 is a deficient number, since it is larger than the sum of its proper divisors (9971436532).

11389758728 is a wasteful number, since it uses less digits than its factorization.

11389758728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 359848 (or 359844 counting only the distinct ones).

The product of its digits is 6773760, while the sum is 59.

The spelling of 11389758728 in words is "eleven billion, three hundred eighty-nine million, seven hundred fifty-eight thousand, seven hundred twenty-eight".