1388939926 has 8 divisors (see below), whose sum is σ = 2272810824. Its totient is φ = 631336320.

The previous prime is 1388939887. The next prime is 1388939977. The reversal of 1388939926 is 6299398831.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31566795 + ... + 31566838.

It is an arithmetic number, because the mean of its divisors is an integer number (284101353).

Almost surely, 2^1388939926 is an apocalyptic number.

1388939926 is a deficient number, since it is larger than the sum of its proper divisors (883870898).

1388939926 is a wasteful number, since it uses less digits than its factorization.

1388939926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63133646.

The product of its digits is 5038848, while the sum is 58.

The square root of 1388939926 is about 37268.4843534051. The cubic root of 1388939926 is about 1115.7352496724.

The spelling of 1388939926 in words is "one billion, three hundred eighty-eight million, nine hundred thirty-nine thousand, nine hundred twenty-six".