1978427682 has 192 divisors, whose sum is σ = 5525065728. Its totient is φ = 500940000.

The previous prime is 1978427681. The next prime is 1978427743. The reversal of 1978427682 is 2867248791.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (1978427681) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 7882057 + ... + 7882307.

It is an arithmetic number, because the mean of its divisors is an integer number (28776384).

Almost surely, 2^1978427682 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1978427682, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2762532864).

1978427682 is an abundant number, since it is smaller than the sum of its proper divisors (3546638046).

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

1978427682 is a wasteful number, since it uses less digits than its factorization.

1978427682 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346 (or 321 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 1978427682 is about 44479.5198040626. The cubic root of 1978427682 is about 1255.3747619173.

The spelling of 1978427682 in words is "one billion, nine hundred seventy-eight million, four hundred twenty-seven thousand, six hundred eighty-two".