1111400928 has 144 divisors (see below), whose sum is σ = 3459888432. Its totient is φ = 335616000.

The previous prime is 1111400911. The next prime is 1111400929. The reversal of 1111400928 is 8290041111.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1111400928² = 2470424045518522368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111400929) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1460068 + ... + 1460828.

It is an arithmetic number, because the mean of its divisors is an integer number (24027003).

Almost surely, 2^1111400928 is an apocalyptic number.

1111400928 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111400928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1729944216).

1111400928 is an abundant number, since it is smaller than the sum of its proper divisors (2348487504).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1111400928 is a wasteful number, since it uses less digits than its factorization.

1111400928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1249 (or 1238 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 27.

The square root of 1111400928 is about 33337.6803032245. The cubic root of 1111400928 is about 1035.8342136686.

The spelling of 1111400928 in words is "one billion, one hundred eleven million, four hundred thousand, nine hundred twenty-eight".