1978612 has 24 divisors (see below), whose sum is σ = 3686760. Its totient is φ = 927360.

The previous prime is 1978597. The next prime is 1978631. The reversal of 1978612 is 2168791.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 524176 + 1454436 = 724^2 + 1206^2 .

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 4062 + ... + 4522.

It is an arithmetic number, because the mean of its divisors is an integer number (153615).

2^1978612 is an apocalyptic number.

It is an amenable number.

1978612 is a deficient number, since it is larger than the sum of its proper divisors (1708148).

1978612 is a wasteful number, since it uses less digits than its factorization.

1978612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 531 (or 529 counting only the distinct ones).

The product of its digits is 6048, while the sum is 34.

The square root of 1978612 is about 1406.6314371576. The cubic root of 1978612 is about 125.5413745901.

The spelling of 1978612 in words is "one million, nine hundred seventy-eight thousand, six hundred twelve".