1782045690 has 32 divisors (see below), whose sum is σ = 4328444736. Its totient is φ = 469486080.

The previous prime is 1782045673. The next prime is 1782045691. The reversal of 1782045690 is 965402871.

It is a super-2 number, since 2×1782045690² = 6351373682495152200, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (1782045691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 355351 + ... + 360330.

It is an arithmetic number, because the mean of its divisors is an integer number (135263898).

Almost surely, 2^1782045690 is an apocalyptic number.

1782045690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1782045690 is an abundant number, since it is smaller than the sum of its proper divisors (2546399046).

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

1782045690 is a wasteful number, since it uses less digits than its factorization.

1782045690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 715774.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 1782045690 is about 42214.2830094270. The cubic root of 1782045690 is about 1212.3823677287.

The spelling of 1782045690 in words is "one billion, seven hundred eighty-two million, forty-five thousand, six hundred ninety".