1388934211 has 8 divisors (see below), whose sum is σ = 1596222720. Its totient is φ = 1183863048.

The previous prime is 1388934179. The next prime is 1388934223. The reversal of 1388934211 is 1124398831.

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

It is a cyclic number.

It is not a de Polignac number, because 1388934211 - 2⁵ = 1388934179 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1388934241) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 552991 + ... + 555496.

It is an arithmetic number, because the mean of its divisors is an integer number (199527840).

Almost surely, 2^1388934211 is an apocalyptic number.

1388934211 is a deficient number, since it is larger than the sum of its proper divisors (207288509).

1388934211 is a wasteful number, since it uses less digits than its factorization.

1388934211 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1108673.

The product of its digits is 41472, while the sum is 40.

The square root of 1388934211 is about 37268.4076799640. The cubic root of 1388934211 is about 1115.7337193841.

The spelling of 1388934211 in words is "one billion, three hundred eighty-eight million, nine hundred thirty-four thousand, two hundred eleven".