1385978 has 16 divisors (see below), whose sum is σ = 2301696. Its totient is φ = 620640.

The previous prime is 1385977. The next prime is 1385987. The reversal of 1385978 is 8795831.

It is a happy number.

It is an Ulam number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1385977) 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, 1175 + ... + 2037.

It is an arithmetic number, because the mean of its divisors is an integer number (143856).

2^1385978 is an apocalyptic number.

1385978 is a deficient number, since it is larger than the sum of its proper divisors (915718).

1385978 is a wasteful number, since it uses less digits than its factorization.

1385978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 949.

The product of its digits is 60480, while the sum is 41.

The square root of 1385978 is about 1177.2756686520. The cubic root of 1385978 is about 111.4941580321.

It can be divided in two parts, 138 and 5978, that added together give a palindrome (6116).

The spelling of 1385978 in words is "one million, three hundred eighty-five thousand, nine hundred seventy-eight".