194220870 has 32 divisors (see below), whose sum is σ = 467562240. Its totient is φ = 51633120.

The previous prime is 194220863. The next prime is 194220893. The reversal of 194220870 is 78022491.

It is a happy number.

194220870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 151 + ... + 19709.

It is an arithmetic number, because the mean of its divisors is an integer number (14611320).

Almost surely, 2^194220870 is an apocalyptic number.

194220870 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194220870 is an abundant number, since it is smaller than the sum of its proper divisors (273341370).

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

194220870 is a wasteful number, since it uses less digits than its factorization.

194220870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19900.

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 194220870 is about 13936.3147926559. The cubic root of 194220870 is about 579.1156459262.

The spelling of 194220870 in words is "one hundred ninety-four million, two hundred twenty thousand, eight hundred seventy".