194718890 has 8 divisors (see below), whose sum is σ = 350494020. Its totient is φ = 77887552.

The previous prime is 194718883. The next prime is 194718899. The reversal of 194718890 is 98817491.

194718890 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 193237801 + 1481089 = 13901^2 + 1217^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×194718890² = 75830892245664200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194718899) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9735935 + ... + 9735954.

Almost surely, 2^194718890 is an apocalyptic number.

194718890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194718890 is a deficient number, since it is larger than the sum of its proper divisors (155775130).

194718890 is a wasteful number, since it uses less digits than its factorization.

194718890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19471896.

The product of its (nonzero) digits is 145152, while the sum is 47.

The square root of 194718890 is about 13954.1710610125. The cubic root of 194718890 is about 579.6102117445.

The spelling of 194718890 in words is "one hundred ninety-four million, seven hundred eighteen thousand, eight hundred ninety".