196787440 has 20 divisors (see below), whose sum is σ = 457530984. Its totient is φ = 78714944.

The previous prime is 196787419. The next prime is 196787467. The reversal of 196787440 is 44787691.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1229842 + ... + 1230001.

Almost surely, 2^196787440 is an apocalyptic number.

196787440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196787440 is an abundant number, since it is smaller than the sum of its proper divisors (260743544).

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

196787440 is a wasteful number, since it uses less digits than its factorization.

196787440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2459856 (or 2459850 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The square root of 196787440 is about 14028.0946674878. The cubic root of 196787440 is about 581.6554370219.

The spelling of 196787440 in words is "one hundred ninety-six million, seven hundred eighty-seven thousand, four hundred forty".