1780461864 has 64 divisors (see below), whose sum is σ = 4981910400. Its totient is φ = 589145472.

The previous prime is 1780461841. The next prime is 1780461889. The reversal of 1780461864 is 4681640871.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 492 + ... + 59675.

It is an arithmetic number, because the mean of its divisors is an integer number (77842350).

Almost surely, 2^1780461864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1780461864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2490955200).

1780461864 is an abundant number, since it is smaller than the sum of its proper divisors (3201448536).

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

1780461864 is a wasteful number, since it uses less digits than its factorization.

1780461864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60319 (or 60309 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1780461864 is about 42195.5194777834. The cubic root of 1780461864 is about 1212.0230855322.

The spelling of 1780461864 in words is "one billion, seven hundred eighty million, four hundred sixty-one thousand, eight hundred sixty-four".