1959978 has 8 divisors (see below), whose sum is σ = 3919968. Its totient is φ = 653324.

The previous prime is 1959973. The next prime is 1960009. The reversal of 1959978 is 8799591.

It is a sphenic number, since it is the product of 3 distinct primes.

1959978 is an admirable number.

It is not an unprimeable number, because it can be changed into a prime (1959973) by changing a digit.

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, 163326 + ... + 163337.

It is an arithmetic number, because the mean of its divisors is an integer number (489996).

2^1959978 is an apocalyptic number.

1959978 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1959978 is a wasteful number, since it uses less digits than its factorization.

1959978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 326668.

The product of its digits is 204120, while the sum is 48.

The square root of 1959978 is about 1399.9921428351. The cubic root of 1959978 is about 125.1460266766.

The spelling of 1959978 in words is "one million, nine hundred fifty-nine thousand, nine hundred seventy-eight".