194989788 has 96 divisors (see below), whose sum is σ = 583923200. Its totient is φ = 55116288.

The previous prime is 194989777. The next prime is 194989801. The reversal of 194989788 is 887989491.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 72003 + ... + 74661.

Almost surely, 2^194989788 is an apocalyptic number.

194989788 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 194989788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (291961600).

194989788 is an abundant number, since it is smaller than the sum of its proper divisors (388933412).

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

194989788 is a wasteful number, since it uses less digits than its factorization.

194989788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2776 (or 2768 counting only the distinct ones).

The product of its digits is 10450944, while the sum is 63.

The square root of 194989788 is about 13963.8743907270. The cubic root of 194989788 is about 579.8788768079.

The spelling of 194989788 in words is "one hundred ninety-four million, nine hundred eighty-nine thousand, seven hundred eighty-eight".