1388061420 has 96 divisors (see below), whose sum is σ = 3956359680. Its totient is φ = 363548160.

The previous prime is 1388061403. The next prime is 1388061421. The reversal of 1388061420 is 241608831.

It is not an unprimeable number, because it can be changed into a prime (1388061421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1361671 + ... + 1362689.

It is an arithmetic number, because the mean of its divisors is an integer number (41212080).

Almost surely, 2^1388061420 is an apocalyptic number.

1388061420 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 1388061420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1978179840).

1388061420 is an abundant number, since it is smaller than the sum of its proper divisors (2568298260).

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

1388061420 is a wasteful number, since it uses less digits than its factorization.

1388061420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1415 (or 1413 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 1388061420 is about 37256.6963108647. The cubic root of 1388061420 is about 1115.4999654770.

The spelling of 1388061420 in words is "one billion, three hundred eighty-eight million, sixty-one thousand, four hundred twenty".