196387280 has 20 divisors (see below), whose sum is σ = 456600612. Its totient is φ = 78554880.

The previous prime is 196387277. The next prime is 196387283. The reversal of 196387280 is 82783691.

It is an interprime number because it is at equal distance from previous prime (196387277) and next prime (196387283).

It can be written as a sum of positive squares in 2 ways, for example, as 76177984 + 120209296 = 8728^2 + 10964^2 .

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196387283) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1227341 + ... + 1227500.

Almost surely, 2^196387280 is an apocalyptic number.

196387280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196387280 is an abundant number, since it is smaller than the sum of its proper divisors (260213332).

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

196387280 is a wasteful number, since it uses less digits than its factorization.

196387280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2454854 (or 2454848 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 44.

The square root of 196387280 is about 14013.8246028698. The cubic root of 196387280 is about 581.2609111915.

The spelling of 196387280 in words is "one hundred ninety-six million, three hundred eighty-seven thousand, two hundred eighty".