193939650 has 96 divisors (see below), whose sum is σ = 562612800. Its totient is φ = 48988800.

The previous prime is 193939639. The next prime is 193939663. The reversal of 193939650 is 56939391.

It is a super-2 number, since 2×193939650² = 75225175684245000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 193939596 and 193939605.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 21870 + ... + 29430.

It is an arithmetic number, because the mean of its divisors is an integer number (5860550).

Almost surely, 2^193939650 is an apocalyptic number.

193939650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 193939650, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281306400).

193939650 is an abundant number, since it is smaller than the sum of its proper divisors (368673150).

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

193939650 is a wasteful number, since it uses less digits than its factorization.

193939650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7601 (or 7590 counting only the distinct ones).

The product of its (nonzero) digits is 196830, while the sum is 45.

The square root of 193939650 is about 13926.2216699290. The cubic root of 193939650 is about 578.8360028434.

The spelling of 193939650 in words is "one hundred ninety-three million, nine hundred thirty-nine thousand, six hundred fifty".