1388463760 has 120 divisors (see below), whose sum is σ = 3442386816. Its totient is φ = 520715520.

The previous prime is 1388463751. The next prime is 1388463773. The reversal of 1388463760 is 673648831.

It is a super-2 number, since 2×1388463760² = 3855663225666675200, 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 1388463760.

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 23 ways as a sum of consecutive naturals, for example, 3783097 + ... + 3783463.

Almost surely, 2^1388463760 is an apocalyptic number.

1388463760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1388463760, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1721193408).

1388463760 is an abundant number, since it is smaller than the sum of its proper divisors (2053923056).

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

1388463760 is a wasteful number, since it uses less digits than its factorization.

1388463760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 549 (or 524 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 46.

The square root of 1388463760 is about 37262.0954858956. The cubic root of 1388463760 is about 1115.6077337388.

The spelling of 1388463760 in words is "one billion, three hundred eighty-eight million, four hundred sixty-three thousand, seven hundred sixty".