196408640 has 112 divisors (see below), whose sum is σ = 484997760. Its totient is φ = 75724800.

The previous prime is 196408637. The next prime is 196408657. The reversal of 196408640 is 46804691.

196408640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 196408594 and 196408603.

It is a congruent number.

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, 1906829 + ... + 1906931.

Almost surely, 2^196408640 is an apocalyptic number.

196408640 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 196408640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (242498880).

196408640 is an abundant number, since it is smaller than the sum of its proper divisors (288589120).

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

196408640 is a wasteful number, since it uses less digits than its factorization.

196408640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 280 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 38.

The square root of 196408640 is about 14014.5866867346. The cubic root of 196408640 is about 581.2819839802.

The spelling of 196408640 in words is "one hundred ninety-six million, four hundred eight thousand, six hundred forty".