1978484 has 6 divisors (see below), whose sum is σ = 3462354. Its totient is φ = 989240.

The previous prime is 1978469. The next prime is 1978507. The reversal of 1978484 is 4848791.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 1882384 + 96100 = 1372^2 + 310^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 247307 + ... + 247314.

It is an arithmetic number, because the mean of its divisors is an integer number (577059).

2^1978484 is an apocalyptic number.

It is an amenable number.

1978484 is a deficient number, since it is larger than the sum of its proper divisors (1483870).

1978484 is a wasteful number, since it uses less digits than its factorization.

1978484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 494625 (or 494623 counting only the distinct ones).

The product of its digits is 64512, while the sum is 41.

The square root of 1978484 is about 1406.5859376519. The cubic root of 1978484 is about 125.5386673653.

The spelling of 1978484 in words is "one million, nine hundred seventy-eight thousand, four hundred eighty-four".