138884811 has 8 divisors (see below), whose sum is σ = 199424400. Its totient is φ = 85467552.

The previous prime is 138884807. The next prime is 138884819. The reversal of 138884811 is 118488831.

138884811 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 138884811 - 2² = 138884807 is a prime.

It is not an unprimeable number, because it can be changed into a prime (138884819) 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, 1780536 + ... + 1780613.

It is an arithmetic number, because the mean of its divisors is an integer number (24928050).

Almost surely, 2^138884811 is an apocalyptic number.

138884811 is a deficient number, since it is larger than the sum of its proper divisors (60539589).

138884811 is a wasteful number, since it uses less digits than its factorization.

138884811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3561165.

The product of its digits is 49152, while the sum is 42.

The square root of 138884811 is about 11784.9400083327. The cubic root of 138884811 is about 517.8670158965.

The spelling of 138884811 in words is "one hundred thirty-eight million, eight hundred eighty-four thousand, eight hundred eleven".