1388240448 has 112 divisors (see below), whose sum is σ = 4277197440. Its totient is φ = 389136384.

The previous prime is 1388240431. The next prime is 1388240461. The reversal of 1388240448 is 8440428831.

1388240448 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (42).

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, 61488 + ... + 80976.

Almost surely, 2^1388240448 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 1388240448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2138598720).

1388240448 is an abundant number, since it is smaller than the sum of its proper divisors (2888956992).

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

1388240448 is a wasteful number, since it uses less digits than its factorization.

1388240448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19564 (or 19554 counting only the distinct ones).

The product of its (nonzero) digits is 196608, while the sum is 42.

The square root of 1388240448 is about 37259.0988618888. The cubic root of 1388240448 is about 1115.5479213623.

The spelling of 1388240448 in words is "one billion, three hundred eighty-eight million, two hundred forty thousand, four hundred forty-eight".