1140651644 has 12 divisors (see below), whose sum is σ = 2177607768. Its totient is φ = 518478000.

The previous prime is 1140651613. The next prime is 1140651649. The reversal of 1140651644 is 4461560411.

It is a self number, because there is not a number n which added to its sum of digits gives 1140651644.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1140651649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12961907 + ... + 12961994.

It is an arithmetic number, because the mean of its divisors is an integer number (181467314).

Almost surely, 2^1140651644 is an apocalyptic number.

It is an amenable number.

1140651644 is a deficient number, since it is larger than the sum of its proper divisors (1036956124).

1140651644 is a wasteful number, since it uses less digits than its factorization.

1140651644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25923916 (or 25923914 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 1140651644 is about 33773.5346684353. The cubic root of 1140651644 is about 1044.8429345069.

The spelling of 1140651644 in words is "one billion, one hundred forty million, six hundred fifty-one thousand, six hundred forty-four".