1240939438 has 8 divisors (see below), whose sum is σ = 1959378120. Its totient is φ = 587813400.

The previous prime is 1240939433. The next prime is 1240939471. The reversal of 1240939438 is 8349390421.

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

It is a junction number, because it is equal to n+sod(n) for n = 1240939394 and 1240939403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1240939433) 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, 16328113 + ... + 16328188.

It is an arithmetic number, because the mean of its divisors is an integer number (244922265).

Almost surely, 2^1240939438 is an apocalyptic number.

1240939438 is a deficient number, since it is larger than the sum of its proper divisors (718438682).

1240939438 is a wasteful number, since it uses less digits than its factorization.

1240939438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32656322.

The product of its (nonzero) digits is 186624, while the sum is 43.

The square root of 1240939438 is about 35226.9703210480. The cubic root of 1240939438 is about 1074.6083124668.

The spelling of 1240939438 in words is "one billion, two hundred forty million, nine hundred thirty-nine thousand, four hundred thirty-eight".