189980740 has 24 divisors (see below), whose sum is σ = 412718040. Its totient is φ = 73371648.

The previous prime is 189980731. The next prime is 189980743. The reversal of 189980740 is 47089981.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 147456 + 189833284 = 384^2 + 13778^2 .

It is not an unprimeable number, because it can be changed into a prime (189980743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 163197 + ... + 164356.

It is an arithmetic number, because the mean of its divisors is an integer number (17196585).

Almost surely, 2^189980740 is an apocalyptic number.

189980740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189980740 is an abundant number, since it is smaller than the sum of its proper divisors (222737300).

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

189980740 is a wasteful number, since it uses less digits than its factorization.

189980740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 327591 (or 327589 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 46.

The square root of 189980740 is about 13783.3501007556. The cubic root of 189980740 is about 574.8702820174.

The spelling of 189980740 in words is "one hundred eighty-nine million, nine hundred eighty thousand, seven hundred forty".