196979958 has 128 divisors (see below), whose sum is σ = 528998400. Its totient is φ = 53117856.

The previous prime is 196979917. The next prime is 196979989. The reversal of 196979958 is 859979691.

It is a super-2 number, since 2×196979958² = 77602207707363528, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a junction number, because it is equal to n+sod(n) for n = 196979895 and 196979904.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1208385 + ... + 1208547.

It is an arithmetic number, because the mean of its divisors is an integer number (4132800).

Almost surely, 2^196979958 is an apocalyptic number.

196979958 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 196979958, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264499200).

196979958 is an abundant number, since it is smaller than the sum of its proper divisors (332018442).

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

196979958 is a wasteful number, since it uses less digits than its factorization.

196979958 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 343 (or 337 counting only the distinct ones).

The product of its digits is 11022480, while the sum is 63.

The square root of 196979958 is about 14034.9548627703. The cubic root of 196979958 is about 581.8450538740.

The spelling of 196979958 in words is "one hundred ninety-six million, nine hundred seventy-nine thousand, nine hundred fifty-eight".