196366640 has 40 divisors (see below), whose sum is σ = 476407008. Its totient is φ = 75130880.

The previous prime is 196366637. The next prime is 196366649. The reversal of 196366640 is 46663691.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (196366649) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51521 + ... + 55200.

Almost surely, 2^196366640 is an apocalyptic number.

196366640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196366640 is an abundant number, since it is smaller than the sum of its proper divisors (280040368).

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

196366640 is a wasteful number, since it uses less digits than its factorization.

196366640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106757 (or 106751 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 41.

The square root of 196366640 is about 14013.0881678522. The cubic root of 196366640 is about 581.2405472699.

The spelling of 196366640 in words is "one hundred ninety-six million, three hundred sixty-six thousand, six hundred forty".