1240430578 has 4 divisors (see below), whose sum is σ = 1860645870. Its totient is φ = 620215288.

The previous prime is 1240430557. The next prime is 1240430593. The reversal of 1240430578 is 8750340421.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 8750340421 = 73 ⋅119867677.

It can be written as a sum of positive squares in only one way, i.e., 1204992369 + 35438209 = 34713^2 + 5953^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 310107643 + ... + 310107646.

Almost surely, 2^1240430578 is an apocalyptic number.

1240430578 is a deficient number, since it is larger than the sum of its proper divisors (620215292).

1240430578 is an equidigital number, since it uses as much as digits as its factorization.

1240430578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 620215291.

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 1240430578 is about 35219.7469894376. The cubic root of 1240430578 is about 1074.4614076489.

Adding to 1240430578 its reverse (8750340421), we get a palindrome (9990770999).

The spelling of 1240430578 in words is "one billion, two hundred forty million, four hundred thirty thousand, five hundred seventy-eight".