1380555216 has 60 divisors (see below), whose sum is σ = 3903507972. Its totient is φ = 455436288.

The previous prime is 1380555173. The next prime is 1380555217. The reversal of 1380555216 is 6125550831.

It is a happy number.

1380555216 is a `hidden beast` number, since 1 + 3 + 80 + 55 + 521 + 6 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 984704400 + 395850816 = 31380^2 + 19896^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1380555217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 35451 + ... + 63386.

Almost surely, 2^1380555216 is an apocalyptic number.

1380555216 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1380555216 is an abundant number, since it is smaller than the sum of its proper divisors (2522952756).

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

1380555216 is a wasteful number, since it uses less digits than its factorization.

1380555216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98948 (or 98939 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 36.

The square root of 1380555216 is about 37155.8234466685. The cubic root of 1380555216 is about 1113.4855711916.

The spelling of 1380555216 in words is "one billion, three hundred eighty million, five hundred fifty-five thousand, two hundred sixteen".