1387560078 has 16 divisors (see below), whose sum is σ = 3083466960. Its totient is φ = 462520008.

The previous prime is 1387560073. The next prime is 1387560079. The reversal of 1387560078 is 8700657831.

1387560078 is a `hidden beast` number, since 1 + 3 + 87 + 560 + 0 + 7 + 8 = 666.

1387560078 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387560073) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12847725 + ... + 12847832.

It is an arithmetic number, because the mean of its divisors is an integer number (192716685).

Almost surely, 2^1387560078 is an apocalyptic number.

1387560078 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1387560078 is an abundant number, since it is smaller than the sum of its proper divisors (1695906882).

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

1387560078 is a wasteful number, since it uses less digits than its factorization.

1387560078 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25695568 (or 25695562 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 45.

The square root of 1387560078 is about 37249.9674899187. The cubic root of 1387560078 is about 1115.3656500164.

It can be divided in two parts, 138 and 7560078, that added together give a triangular number (7560216 = T₃₈₈₈).

The spelling of 1387560078 in words is "one billion, three hundred eighty-seven million, five hundred sixty thousand, seventy-eight".