1388452488 has 64 divisors (see below), whose sum is σ = 3601800000. Its totient is φ = 445492992.

The previous prime is 1388452453. The next prime is 1388452603. The reversal of 1388452488 is 8842548831.

It is a super-2 number, since 2×1388452488² = 3855600622866780288, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1388452488.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238638 + ... + 244386.

It is an arithmetic number, because the mean of its divisors is an integer number (56278125).

Almost surely, 2^1388452488 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388452488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1800900000).

1388452488 is an abundant number, since it is smaller than the sum of its proper divisors (2213347512).

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

1388452488 is a wasteful number, since it uses less digits than its factorization.

1388452488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6134 (or 6130 counting only the distinct ones).

The product of its digits is 1966080, while the sum is 51.

The square root of 1388452488 is about 37261.9442326887. The cubic root of 1388452488 is about 1115.6047147753.

The spelling of 1388452488 in words is "one billion, three hundred eighty-eight million, four hundred fifty-two thousand, four hundred eighty-eight".