196657428 has 144 divisors (see below), whose sum is σ = 553416192. Its totient is φ = 54067200.

The previous prime is 196657427. The next prime is 196657441. The reversal of 196657428 is 824756691.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196657421) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 765076 + ... + 765332.

It is an arithmetic number, because the mean of its divisors is an integer number (3843168).

Almost surely, 2^196657428 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196657428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (276708096).

196657428 is an abundant number, since it is smaller than the sum of its proper divisors (356758764).

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

196657428 is a wasteful number, since it uses less digits than its factorization.

196657428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334 (or 321 counting only the distinct ones).

The product of its digits is 725760, while the sum is 48.

The square root of 196657428 is about 14023.4599154417. The cubic root of 196657428 is about 581.5273142674.

The spelling of 196657428 in words is "one hundred ninety-six million, six hundred fifty-seven thousand, four hundred twenty-eight".