1781372082 has 64 divisors (see below), whose sum is σ = 4162233600. Its totient is φ = 497712384.

The previous prime is 1781372071. The next prime is 1781372107. The reversal of 1781372082 is 2802731871.

It is a self number, because there is not a number n which added to its sum of digits gives 1781372082.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 775728 + ... + 778020.

It is an arithmetic number, because the mean of its divisors is an integer number (65034900).

Almost surely, 2^1781372082 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1781372082, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2081116800).

1781372082 is an abundant number, since it is smaller than the sum of its proper divisors (2380861518).

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

1781372082 is a wasteful number, since it uses less digits than its factorization.

1781372082 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 1781372082 is about 42206.3038182687. The cubic root of 1781372082 is about 1212.2295894941.

The spelling of 1781372082 in words is "one billion, seven hundred eighty-one million, three hundred seventy-two thousand, eighty-two".