1140555640 has 32 divisors (see below), whose sum is σ = 2932858080. Its totient is φ = 391047552.

The previous prime is 1140555629. The next prime is 1140555641. The reversal of 1140555640 is 465550411.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140555641) 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, 2036427 + ... + 2036986.

It is an arithmetic number, because the mean of its divisors is an integer number (91651815).

Almost surely, 2^1140555640 is an apocalyptic number.

1140555640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1140555640 is an abundant number, since it is smaller than the sum of its proper divisors (1792302440).

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

1140555640 is a wasteful number, since it uses less digits than its factorization.

1140555640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4073431 (or 4073427 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 1140555640 is about 33772.1133481457. The cubic root of 1140555640 is about 1044.8136202940.

The spelling of 1140555640 in words is "one billion, one hundred forty million, five hundred fifty-five thousand, six hundred forty".