194639650 has 24 divisors (see below), whose sum is σ = 362654244. Its totient is φ = 77721600.

The previous prime is 194639633. The next prime is 194639657. The reversal of 194639650 is 56936491.

It can be written as a sum of positive squares in 6 ways, for example, as 157025961 + 37613689 = 12531^2 + 6133^2 .

It is a junction number, because it is equal to n+sod(n) for n = 194639597 and 194639606.

It is not an unprimeable number, because it can be changed into a prime (194639657) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29014 + ... + 35086.

Almost surely, 2^194639650 is an apocalyptic number.

194639650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194639650 is a deficient number, since it is larger than the sum of its proper divisors (168014594).

194639650 is a wasteful number, since it uses less digits than its factorization.

194639650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6726 (or 6721 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 43.

The square root of 194639650 is about 13951.3314776762. The cubic root of 194639650 is about 579.5315777974.

The spelling of 194639650 in words is "one hundred ninety-four million, six hundred thirty-nine thousand, six hundred fifty".