194434890 has 32 divisors (see below), whose sum is σ = 502540416. Its totient is φ = 47860800.

The previous prime is 194434861. The next prime is 194434897. The reversal of 194434890 is 98434491.

It is not an unprimeable number, because it can be changed into a prime (194434897) 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, 248886 + ... + 249665.

It is an arithmetic number, because the mean of its divisors is an integer number (15704388).

Almost surely, 2^194434890 is an apocalyptic number.

194434890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194434890 is an abundant number, since it is smaller than the sum of its proper divisors (308105526).

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

194434890 is a wasteful number, since it uses less digits than its factorization.

194434890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498574.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 194434890 is about 13943.9911789989. The cubic root of 194434890 is about 579.3282849913.

The spelling of 194434890 in words is "one hundred ninety-four million, four hundred thirty-four thousand, eight hundred ninety".