193216940 has 48 divisors (see below), whose sum is σ = 466620672. Its totient is φ = 65831616.

The previous prime is 193216913. The next prime is 193216943. The reversal of 193216940 is 49612391.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 193216940.

It is not an unprimeable number, because it can be changed into a prime (193216943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18587 + ... + 27053.

It is an arithmetic number, because the mean of its divisors is an integer number (9721264).

Almost surely, 2^193216940 is an apocalyptic number.

193216940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 193216940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233310336).

193216940 is an abundant number, since it is smaller than the sum of its proper divisors (273403732).

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

193216940 is a wasteful number, since it uses less digits than its factorization.

193216940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8646 (or 8644 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 35.

The square root of 193216940 is about 13900.2496380461. The cubic root of 193216940 is about 578.1161031599.

The spelling of 193216940 in words is "one hundred ninety-three million, two hundred sixteen thousand, nine hundred forty".