1388895648 has 96 divisors (see below), whose sum is σ = 4411822464. Its totient is φ = 373481472.

The previous prime is 1388895589. The next prime is 1388895659. The reversal of 1388895648 is 8465988831.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×1388895648² = 3858062242066679808, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1388895591 and 1388895600.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49365 + ... + 72212.

It is an arithmetic number, because the mean of its divisors is an integer number (45956484).

Almost surely, 2^1388895648 is an apocalyptic number.

It is an amenable number.

1388895648 is an abundant number, since it is smaller than the sum of its proper divisors (3022926816).

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

1388895648 is a wasteful number, since it uses less digits than its factorization.

1388895648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121614 (or 121606 counting only the distinct ones).

The product of its digits is 13271040, while the sum is 60.

The square root of 1388895648 is about 37267.8903078776. The cubic root of 1388895648 is about 1115.7233933760.

The spelling of 1388895648 in words is "one billion, three hundred eighty-eight million, eight hundred ninety-five thousand, six hundred forty-eight".