1378812 has 12 divisors (see below), whose sum is σ = 3217256. Its totient is φ = 459600.

The previous prime is 1378807. The next prime is 1378813. The reversal of 1378812 is 2188731.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×1378812² = 3802245062688, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378812.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1378813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 57439 + ... + 57462.

2^1378812 is an apocalyptic number.

1378812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1378812 is an abundant number, since it is smaller than the sum of its proper divisors (1838444).

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

1378812 is a wasteful number, since it uses less digits than its factorization.

1378812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114908 (or 114906 counting only the distinct ones).

The product of its digits is 2688, while the sum is 30.

The square root of 1378812 is about 1174.2282571970. The cubic root of 1378812 is about 111.3016710694.

The spelling of 1378812 in words is "one million, three hundred seventy-eight thousand, eight hundred twelve".