1238640706 has 24 divisors (see below), whose sum is σ = 1997538480. Its totient is φ = 575844672.

The previous prime is 1238640703. The next prime is 1238640731. The reversal of 1238640706 is 6070468321.

It is not an unprimeable number, because it can be changed into a prime (1238640703) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35065 + ... + 60883.

It is an arithmetic number, because the mean of its divisors is an integer number (83230770).

Almost surely, 2^1238640706 is an apocalyptic number.

1238640706 is a deficient number, since it is larger than the sum of its proper divisors (758897774).

1238640706 is a wasteful number, since it uses less digits than its factorization.

1238640706 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25938 (or 25921 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 37.

The square root of 1238640706 is about 35194.3277532048. The cubic root of 1238640706 is about 1073.9443629593.

The spelling of 1238640706 in words is "one billion, two hundred thirty-eight million, six hundred forty thousand, seven hundred six".