1388833152 has 64 divisors (see below), whose sum is σ = 4216108800. Its totient is φ = 396808704.

The previous prime is 1388833133. The next prime is 1388833153. The reversal of 1388833152 is 2513388831.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1388833153) 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, 255652 + ... + 261027.

It is an arithmetic number, because the mean of its divisors is an integer number (65876700).

Almost surely, 2^1388833152 is an apocalyptic number.

1388833152 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1388833152 is an abundant number, since it is smaller than the sum of its proper divisors (2827275648).

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

1388833152 is an equidigital number, since it uses as much as digits as its factorization.

1388833152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516703 (or 516691 counting only the distinct ones).

The product of its digits is 138240, while the sum is 42.

The square root of 1388833152 is about 37267.0518286596. The cubic root of 1388833152 is about 1115.7066584266.

The spelling of 1388833152 in words is "one billion, three hundred eighty-eight million, eight hundred thirty-three thousand, one hundred fifty-two".