1978148 has 12 divisors (see below), whose sum is σ = 3581340. Its totient is φ = 954912.

The previous prime is 1978117. The next prime is 1978153. The reversal of 1978148 is 8418791.

It can be written as a sum of positive squares in 2 ways, for example, as 879844 + 1098304 = 938^2 + 1048^2 .

It is a super-3 number, since 3×1978148³ = 23221891874632733376, which contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 8411 + ... + 8642.

It is an arithmetic number, because the mean of its divisors is an integer number (298445).

2^1978148 is an apocalyptic number.

It is an amenable number.

1978148 is a deficient number, since it is larger than the sum of its proper divisors (1603192).

1978148 is a wasteful number, since it uses less digits than its factorization.

1978148 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17086 (or 17084 counting only the distinct ones).

The product of its digits is 16128, while the sum is 38.

The square root of 1978148 is about 1406.4664944463. The cubic root of 1978148 is about 125.5315603446.

The spelling of 1978148 in words is "one million, nine hundred seventy-eight thousand, one hundred forty-eight".