1140243994 has 8 divisors (see below), whose sum is σ = 1712024820. Its totient is φ = 569569056.

The previous prime is 1140243991. The next prime is 1140243997. The reversal of 1140243994 is 4993420411.

It is an interprime number because it is at equal distance from previous prime (1140243991) and next prime (1140243997).

It can be written as a sum of positive squares in 2 ways, for example, as 920819025 + 219424969 = 30345^2 + 14813^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1140243991) 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, 273889 + ... + 278020.

Almost surely, 2^1140243994 is an apocalyptic number.

1140243994 is a deficient number, since it is larger than the sum of its proper divisors (571780826).

1140243994 is a wasteful number, since it uses less digits than its factorization.

1140243994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 552944.

The product of its (nonzero) digits is 31104, while the sum is 37.

The square root of 1140243994 is about 33767.4990782557. The cubic root of 1140243994 is about 1044.7184498247.

The spelling of 1140243994 in words is "one billion, one hundred forty million, two hundred forty-three thousand, nine hundred ninety-four".