196917984 has 72 divisors (see below), whose sum is σ = 573044472. Its totient is φ = 64108800.

The previous prime is 196917979. The next prime is 196918009. The reversal of 196917984 is 489719691.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 196917984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4434 + ... + 20334.

It is an arithmetic number, because the mean of its divisors is an integer number (7958951).

Almost surely, 2^196917984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196917984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (286522236).

196917984 is an abundant number, since it is smaller than the sum of its proper divisors (376126488).

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

196917984 is a wasteful number, since it uses less digits than its factorization.

196917984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15960 (or 15949 counting only the distinct ones).

The product of its digits is 979776, while the sum is 54.

The square root of 196917984 is about 14032.7468444350. The cubic root of 196917984 is about 581.7840272801.

The spelling of 196917984 in words is "one hundred ninety-six million, nine hundred seventeen thousand, nine hundred eighty-four".