194138650 has 12 divisors (see below), whose sum is σ = 361097982. Its totient is φ = 77655440.

The previous prime is 194138641. The next prime is 194138683. The reversal of 194138650 is 56831491.

It can be written as a sum of positive squares in 3 ways, for example, as 114768369 + 79370281 = 10713^2 + 8909^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1941337 + ... + 1941436.

Almost surely, 2^194138650 is an apocalyptic number.

194138650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

194138650 is a deficient number, since it is larger than the sum of its proper divisors (166959332).

194138650 is a wasteful number, since it uses less digits than its factorization.

194138650 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3882785 (or 3882780 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 194138650 is about 13933.3646331387. The cubic root of 194138650 is about 579.0339149070.

The spelling of 194138650 in words is "one hundred ninety-four million, one hundred thirty-eight thousand, six hundred fifty".