1978012 has 12 divisors (see below), whose sum is σ = 3495856. Its totient is φ = 979200.

The previous prime is 1977991. The next prime is 1978021. The reversal of 1978012 is 2108791.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989 + ... + 2812.

2^1978012 is an apocalyptic number.

It is an amenable number.

1978012 is a deficient number, since it is larger than the sum of its proper divisors (1517844).

1978012 is a wasteful number, since it uses less digits than its factorization.

1978012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4908 (or 4906 counting only the distinct ones).

The product of its (nonzero) digits is 1008, while the sum is 28.

The square root of 1978012 is about 1406.4181455030. The cubic root of 1978012 is about 125.5286834646.

The spelling of 1978012 in words is "one million, nine hundred seventy-eight thousand, twelve".