193368640 has 28 divisors (see below), whose sum is σ = 460459836. Its totient is φ = 77347328.

The previous prime is 193368619. The next prime is 193368647. The reversal of 193368640 is 46863391.

It can be written as a sum of positive squares in 2 ways, for example, as 41783296 + 151585344 = 6464^2 + 12312^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 193368593 and 193368602.

It is not an unprimeable number, because it can be changed into a prime (193368647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 301819 + ... + 302458.

Almost surely, 2^193368640 is an apocalyptic number.

193368640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

193368640 is an abundant number, since it is smaller than the sum of its proper divisors (267091196).

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

193368640 is an equidigital number, since it uses as much as digits as its factorization.

193368640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 604294 (or 604284 counting only the distinct ones).

The product of its (nonzero) digits is 93312, while the sum is 40.

The square root of 193368640 is about 13905.7053039391. The cubic root of 193368640 is about 578.2673619313.

The spelling of 193368640 in words is "one hundred ninety-three million, three hundred sixty-eight thousand, six hundred forty".