11161238428 has 12 divisors (see below), whose sum is σ = 20381392080. Its totient is φ = 5337983552.

The previous prime is 11161238399. The next prime is 11161238449. The reversal of 11161238428 is 82483216111.

It is a super-2 number, since 2×11161238428² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

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, 60658813 + ... + 60658996.

It is an arithmetic number, because the mean of its divisors is an integer number (1698449340).

Almost surely, 2^11161238428 is an apocalyptic number.

It is an amenable number.

11161238428 is a deficient number, since it is larger than the sum of its proper divisors (9220153652).

11161238428 is a wasteful number, since it uses less digits than its factorization.

11161238428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121317836 (or 121317834 counting only the distinct ones).

The product of its digits is 18432, while the sum is 37.

The spelling of 11161238428 in words is "eleven billion, one hundred sixty-one million, two hundred thirty-eight thousand, four hundred twenty-eight".