1388834811 has 96 divisors (see below), whose sum is σ = 2620800000. Its totient is φ = 688207104.

The previous prime is 1388834803. The next prime is 1388834827. The reversal of 1388834811 is 1184388831.

It is a happy number.

1388834811 is a `hidden beast` number, since 13 + 88 + 83 + 481 + 1 = 666.

It is not a de Polignac number, because 1388834811 - 2³ = 1388834803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1388834801) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2318290 + ... + 2318888.

It is an arithmetic number, because the mean of its divisors is an integer number (27300000).

Almost surely, 2^1388834811 is an apocalyptic number.

1388834811 is a deficient number, since it is larger than the sum of its proper divisors (1231965189).

1388834811 is a wasteful number, since it uses less digits than its factorization.

1388834811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 793 (or 790 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 1388834811 is about 37267.0740869202. The cubic root of 1388834811 is about 1115.7071026741.

The spelling of 1388834811 in words is "one billion, three hundred eighty-eight million, eight hundred thirty-four thousand, eight hundred eleven".