194387380 has 24 divisors (see below), whose sum is σ = 445324320. Its totient is φ = 70686240.

The previous prime is 194387357. The next prime is 194387383. The reversal of 194387380 is 83783491.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194387383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 441570 + ... + 442009.

It is an arithmetic number, because the mean of its divisors is an integer number (18555180).

Almost surely, 2^194387380 is an apocalyptic number.

194387380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

194387380 is an abundant number, since it is smaller than the sum of its proper divisors (250936940).

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

194387380 is a wasteful number, since it uses less digits than its factorization.

194387380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883599 (or 883597 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 43.

The square root of 194387380 is about 13942.2874737254. The cubic root of 194387380 is about 579.2810950229.

The spelling of 194387380 in words is "one hundred ninety-four million, three hundred eighty-seven thousand, three hundred eighty".