1388047530 has 16 divisors (see below), whose sum is σ = 3331314144. Its totient is φ = 370146000.

The previous prime is 1388047523. The next prime is 1388047541. The reversal of 1388047530 is 357408831.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23134096 + ... + 23134155.

It is an arithmetic number, because the mean of its divisors is an integer number (208207134).

Almost surely, 2^1388047530 is an apocalyptic number.

1388047530 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1388047530 is an abundant number, since it is smaller than the sum of its proper divisors (1943266614).

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

1388047530 is a wasteful number, since it uses less digits than its factorization.

1388047530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46268261.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 1388047530 is about 37256.5099009556. The cubic root of 1388047530 is about 1115.4962446171.

The spelling of 1388047530 in words is "one billion, three hundred eighty-eight million, forty-seven thousand, five hundred thirty".