196857040 has 80 divisors (see below), whose sum is σ = 470059200. Its totient is φ = 76645376.

The previous prime is 196857013. The next prime is 196857049. The reversal of 196857040 is 40758691.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 196856984 and 196857002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196857049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 844764 + ... + 844996.

It is an arithmetic number, because the mean of its divisors is an integer number (5875740).

Almost surely, 2^196857040 is an apocalyptic number.

196857040 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 196857040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (235029600).

196857040 is an abundant number, since it is smaller than the sum of its proper divisors (273202160).

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

196857040 is a wasteful number, since it uses less digits than its factorization.

196857040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 484 (or 478 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 40.

The square root of 196857040 is about 14030.5751842182. The cubic root of 196857040 is about 581.7240024524.

The spelling of 196857040 in words is "one hundred ninety-six million, eight hundred fifty-seven thousand, forty".