1380805888 has 108 divisors (see below), whose sum is σ = 3498036192. Its totient is φ = 537922560.

The previous prime is 1380805883. The next prime is 1380805891. The reversal of 1380805888 is 8885080831.

It is a Harshad number since it is a multiple of its sum of digits (49).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380805883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132981 + ... + 142987.

It is an arithmetic number, because the mean of its divisors is an integer number (32389224).

Almost surely, 2^1380805888 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 1380805888, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1749018096).

1380805888 is an abundant number, since it is smaller than the sum of its proper divisors (2117230304).

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

1380805888 is a wasteful number, since it uses less digits than its factorization.

1380805888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10048 (or 10027 counting only the distinct ones).

The product of its (nonzero) digits is 491520, while the sum is 49.

The square root of 1380805888 is about 37159.1965467500. The cubic root of 1380805888 is about 1113.5529602053.

The spelling of 1380805888 in words is "one billion, three hundred eighty million, eight hundred five thousand, eight hundred eighty-eight".