1387816 has 16 divisors (see below), whose sum is σ = 2658240. Its totient is φ = 678960.

The previous prime is 1387807. The next prime is 1387819. The reversal of 1387816 is 6187831.

It is not an unprimeable number, because it can be changed into a prime (1387819) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1470 + ... + 2221.

It is an arithmetic number, because the mean of its divisors is an integer number (166140).

2^1387816 is an apocalyptic number.

It is an amenable number.

1387816 is a deficient number, since it is larger than the sum of its proper divisors (1270424).

1387816 is a wasteful number, since it uses less digits than its factorization.

1387816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3744 (or 3740 counting only the distinct ones).

The product of its digits is 8064, while the sum is 34.

The square root of 1387816 is about 1178.0560258324. The cubic root of 1387816 is about 111.5434218593.

The spelling of 1387816 in words is "one million, three hundred eighty-seven thousand, eight hundred sixteen".