1387687356 has 96 divisors (see below), whose sum is σ = 4155701760. Its totient is φ = 395769600.

The previous prime is 1387687351. The next prime is 1387687391. The reversal of 1387687356 is 6537867831.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1387687351) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14160 + ... + 54551.

It is an arithmetic number, because the mean of its divisors is an integer number (43288560).

Almost surely, 2^1387687356 is an apocalyptic number.

It is an amenable number.

1387687356 is an abundant number, since it is smaller than the sum of its proper divisors (2768014404).

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

1387687356 is a wasteful number, since it uses less digits than its factorization.

1387687356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68752 (or 68744 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 54.

The square root of 1387687356 is about 37251.6758817640. The cubic root of 1387687356 is about 1115.3997523641.

The spelling of 1387687356 in words is "one billion, three hundred eighty-seven million, six hundred eighty-seven thousand, three hundred fifty-six".