1780347345 has 16 divisors (see below), whose sum is σ = 3255492480. Its totient is φ = 813873024.

The previous prime is 1780347337. The next prime is 1780347377. The reversal of 1780347345 is 5437430871.

It is not a de Polignac number, because 1780347345 - 2³ = 1780347337 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1780347297 and 1780347306.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8477740 + ... + 8477949.

It is an arithmetic number, because the mean of its divisors is an integer number (203468280).

Almost surely, 2^1780347345 is an apocalyptic number.

1780347345 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1780347345 is a deficient number, since it is larger than the sum of its proper divisors (1475145135).

1780347345 is a wasteful number, since it uses less digits than its factorization.

1780347345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16955704.

The product of its (nonzero) digits is 282240, while the sum is 42.

The square root of 1780347345 is about 42194.1624516947. The cubic root of 1780347345 is about 1211.9970992698.

The spelling of 1780347345 in words is "one billion, seven hundred eighty million, three hundred forty-seven thousand, three hundred forty-five".