1144640140 has 48 divisors (see below), whose sum is σ = 2821396032. Its totient is φ = 381839616.

The previous prime is 1144640129. The next prime is 1144640191. The reversal of 1144640140 is 410464411.

It is a happy number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 105307 + ... + 115666.

It is an arithmetic number, because the mean of its divisors is an integer number (58779084).

Almost surely, 2^1144640140 is an apocalyptic number.

1144640140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1144640140 is an abundant number, since it is smaller than the sum of its proper divisors (1676755892).

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

1144640140 is a wasteful number, since it uses less digits than its factorization.

1144640140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 221026 (or 221024 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 1144640140 is about 33832.5307950795. The cubic root of 1144640140 is about 1046.0593456111.

The spelling of 1144640140 in words is "one billion, one hundred forty-four million, six hundred forty thousand, one hundred forty".