1388516652 has 36 divisors (see below), whose sum is σ = 3514567056. Its totient is φ = 462218400.

The previous prime is 1388516651. The next prime is 1388516671. The reversal of 1388516652 is 2566158831.

1388516652 is a `hidden beast` number, since 1 + 3 + 88 + 516 + 6 + 52 = 666.

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

It is a junction number, because it is equal to n+sod(n) for n = 1388516598 and 1388516607.

It is not an unprimeable number, because it can be changed into a prime (1388516651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1777 + ... + 52727.

Almost surely, 2^1388516652 is an apocalyptic number.

1388516652 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1388516652 is an abundant number, since it is smaller than the sum of its proper divisors (2126050404).

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

1388516652 is a wasteful number, since it uses less digits than its factorization.

1388516652 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51718 (or 51713 counting only the distinct ones).

The product of its digits is 345600, while the sum is 45.

The square root of 1388516652 is about 37262.8052084112. The cubic root of 1388516652 is about 1115.6218995088.

The spelling of 1388516652 in words is "one billion, three hundred eighty-eight million, five hundred sixteen thousand, six hundred fifty-two".