194661980 has 48 divisors (see below), whose sum is σ = 417577440. Its totient is φ = 76204800.

The previous prime is 194661979. The next prime is 194661983. The reversal of 194661980 is 89166491.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194661983) 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, 462170 + ... + 462590.

It is an arithmetic number, because the mean of its divisors is an integer number (8699530).

Almost surely, 2^194661980 is an apocalyptic number.

194661980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194661980 is an abundant number, since it is smaller than the sum of its proper divisors (222915460).

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

194661980 is a wasteful number, since it uses less digits than its factorization.

194661980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870 (or 868 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 194661980 is about 13952.1317367634. The cubic root of 194661980 is about 579.5537391697.

The spelling of 194661980 in words is "one hundred ninety-four million, six hundred sixty-one thousand, nine hundred eighty".