1979958 has 8 divisors (see below), whose sum is σ = 3959928. Its totient is φ = 659984.

The previous prime is 1979947. The next prime is 1979993. The reversal of 1979958 is 8599791.

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

1979958 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 164991 + ... + 165002.

It is an arithmetic number, because the mean of its divisors is an integer number (494991).

2^1979958 is an apocalyptic number.

1979958 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.

1979958 is a wasteful number, since it uses less digits than its factorization.

1979958 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329998.

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

The square root of 1979958 is about 1407.1098038177. The cubic root of 1979958 is about 125.5698356843.

The spelling of 1979958 in words is "one million, nine hundred seventy-nine thousand, nine hundred fifty-eight".