1380819564 has 36 divisors (see below), whose sum is σ = 3491803224. Its totient is φ = 460088832.

The previous prime is 1380819563. The next prime is 1380819593. The reversal of 1380819564 is 4659180831.

1380819564 is a `hidden beast` number, since 1 + 3 + 8 + 0 + 81 + 9 + 564 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (1380819563) 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, 106819 + ... + 119045.

It is an arithmetic number, because the mean of its divisors is an integer number (96994534).

Almost surely, 2^1380819564 is an apocalyptic number.

It is an amenable number.

1380819564 is an abundant number, since it is smaller than the sum of its proper divisors (2110983660).

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

1380819564 is a wasteful number, since it uses less digits than its factorization.

1380819564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15374 (or 15369 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 45.

The square root of 1380819564 is about 37159.3805653431. The cubic root of 1380819564 is about 1113.5566365367.

The spelling of 1380819564 in words is "one billion, three hundred eighty million, eight hundred nineteen thousand, five hundred sixty-four".