1111640144 has 40 divisors (see below), whose sum is σ = 2285091840. Its totient is φ = 522402048.

The previous prime is 1111640143. The next prime is 1111640147. The reversal of 1111640144 is 4410461111.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1111640141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24212 + ... + 53004.

It is an arithmetic number, because the mean of its divisors is an integer number (57127296).

Almost surely, 2^1111640144 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1111640144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1142545920).

1111640144 is an abundant number, since it is smaller than the sum of its proper divisors (1173451696).

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

1111640144 is a wasteful number, since it uses less digits than its factorization.

1111640144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28947 (or 28941 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 1111640144 is about 33341.2678823107. The cubic root of 1111640144 is about 1035.9085253879.

The spelling of 1111640144 in words is "one billion, one hundred eleven million, six hundred forty thousand, one hundred forty-four".