1388284884 has 36 divisors (see below), whose sum is σ = 4010601504. Its totient is φ = 396652752.

The previous prime is 1388284883. The next prime is 1388284907. The reversal of 1388284884 is 4884828831.

1388284884 is a `hidden beast` number, since 138 + 8 + 28 + 488 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1388284884.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388284883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2754282 + ... + 2754785.

Almost surely, 2^1388284884 is an apocalyptic number.

1388284884 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1388284884 is an abundant number, since it is smaller than the sum of its proper divisors (2622316620).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1388284884 is a wasteful number, since it uses less digits than its factorization.

1388284884 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5509084 (or 5509079 counting only the distinct ones).

The product of its digits is 3145728, while the sum is 54.

The square root of 1388284884 is about 37259.6951678352. The cubic root of 1388284884 is about 1115.5598237093.

The spelling of 1388284884 in words is "one billion, three hundred eighty-eight million, two hundred eighty-four thousand, eight hundred eighty-four".