196001640 has 128 divisors (see below), whose sum is σ = 658944000. Its totient is φ = 51819264.

The previous prime is 196001639. The next prime is 196001651. The reversal of 196001640 is 46100691.

196001640 is a `hidden beast` number, since 1 + 9 + 600 + 16 + 40 = 666.

196001640 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 136446 + ... + 137874.

It is an arithmetic number, because the mean of its divisors is an integer number (5148000).

Almost surely, 2^196001640 is an apocalyptic number.

196001640 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 196001640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (329472000).

196001640 is an abundant number, since it is smaller than the sum of its proper divisors (462942360).

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

196001640 is a wasteful number, since it uses less digits than its factorization.

196001640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1576 (or 1566 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 196001640 is about 14000.0585713061. The cubic root of 196001640 is about 580.8801934894.

The spelling of 196001640 in words is "one hundred ninety-six million, one thousand, six hundred forty".