1380615678 has 48 divisors (see below), whose sum is σ = 3340764336. Its totient is φ = 424802880.

The previous prime is 1380615667. The next prime is 1380615683. The reversal of 1380615678 is 8765160831.

1380615678 is a `hidden beast` number, since 1 + 3 + 80 + 6 + 1 + 567 + 8 = 666.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 102943 + ... + 115578.

It is an arithmetic number, because the mean of its divisors is an integer number (69599257).

Almost surely, 2^1380615678 is an apocalyptic number.

1380615678 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1380615678 is an abundant number, since it is smaller than the sum of its proper divisors (1960148658).

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

1380615678 is a wasteful number, since it uses less digits than its factorization.

1380615678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218551 (or 218539 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 45.

The square root of 1380615678 is about 37156.6370652674. The cubic root of 1380615678 is about 1113.5018261449.

The spelling of 1380615678 in words is "one billion, three hundred eighty million, six hundred fifteen thousand, six hundred seventy-eight".