196432640 has 144 divisors (see below), whose sum is σ = 509937120. Its totient is φ = 72253440.

The previous prime is 196432609. The next prime is 196432651. The reversal of 196432640 is 46234691.

It is a nialpdrome in base 16.

It is a self number, because there is not a number n which added to its sum of digits gives 196432640.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 997022 + ... + 997218.

It is an arithmetic number, because the mean of its divisors is an integer number (3541230).

Almost surely, 2^196432640 is an apocalyptic number.

196432640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196432640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (254968560).

196432640 is an abundant number, since it is smaller than the sum of its proper divisors (313504480).

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

196432640 is a wasteful number, since it uses less digits than its factorization.

196432640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 278 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

The square root of 196432640 is about 14015.4429113032. The cubic root of 196432640 is about 581.3056594482.

The spelling of 196432640 in words is "one hundred ninety-six million, four hundred thirty-two thousand, six hundred forty".