1720358642 has 8 divisors (see below), whose sum is σ = 2580796416. Its totient is φ = 860093172.

The previous prime is 1720358621. The next prime is 1720358681. The reversal of 1720358642 is 2468530271.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 1720358596 and 1720358605.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14258 + ... + 60365.

It is an arithmetic number, because the mean of its divisors is an integer number (322599552).

Almost surely, 2^1720358642 is an apocalyptic number.

1720358642 is a deficient number, since it is larger than the sum of its proper divisors (860437774).

1720358642 is a wasteful number, since it uses less digits than its factorization.

1720358642 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86152.

The product of its (nonzero) digits is 80640, while the sum is 38.

The square root of 1720358642 is about 41477.2062945421. The cubic root of 1720358642 is about 1198.2285533972.

The spelling of 1720358642 in words is "one billion, seven hundred twenty million, three hundred fifty-eight thousand, six hundred forty-two".