1780040019 has 16 divisors (see below), whose sum is σ = 2386137600. Its totient is φ = 1180333056.

The previous prime is 1780039999. The next prime is 1780040069. The reversal of 1780040019 is 9100400871.

It is not a de Polignac number, because 1780040019 - 2⁸ = 1780039763 is a prime.

It is a super-2 number, since 2×1780040019² = 6337084938483040722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1780040069) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 660627 + ... + 663315.

It is an arithmetic number, because the mean of its divisors is an integer number (149133600).

Almost surely, 2^1780040019 is an apocalyptic number.

1780040019 is a deficient number, since it is larger than the sum of its proper divisors (606097581).

1780040019 is a wasteful number, since it uses less digits than its factorization.

1780040019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3794.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 1780040019 is about 42190.5204874270. The cubic root of 1780040019 is about 1211.9273563895.

The spelling of 1780040019 in words is "one billion, seven hundred eighty million, forty thousand, nineteen".