1978120 has 32 divisors (see below), whose sum is σ = 4714200. Its totient is φ = 744448.

The previous prime is 1978117. The next prime is 1978153. The reversal of 1978120 is 218791.

1978120 is nontrivially palindromic in base 3.

It can be written as a sum of positive squares in 4 ways, for example, as 1954404 + 23716 = 1398^2 + 154^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 775 + ... + 2134.

2^1978120 is an apocalyptic number.

1978120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1978120 is an abundant number, since it is smaller than the sum of its proper divisors (2736080).

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

1978120 is a wasteful number, since it uses less digits than its factorization.

1978120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2937 (or 2933 counting only the distinct ones).

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

The square root of 1978120 is about 1406.4565403879. The cubic root of 1978120 is about 125.5309680566.

It can be divided in two parts, 1 and 978120, that added together give a square (978121 = 989²).

The spelling of 1978120 in words is "one million, nine hundred seventy-eight thousand, one hundred twenty".