196946640 has 280 divisors, whose sum is σ = 751389408. Its totient is φ = 47589120.

The previous prime is 196946639. The next prime is 196946653. The reversal of 196946640 is 46649691.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 641367 + ... + 641673.

Almost surely, 2^196946640 is an apocalyptic number.

196946640 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 196946640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (375694704).

196946640 is an abundant number, since it is smaller than the sum of its proper divisors (554442768).

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

196946640 is a wasteful number, since it uses less digits than its factorization.

196946640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349 (or 328 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 45.

The square root of 196946640 is about 14033.7678475882. The cubic root of 196946640 is about 581.8122468026.

The spelling of 196946640 in words is "one hundred ninety-six million, nine hundred forty-six thousand, six hundred forty".