1785049812 has 378 divisors, whose sum is σ = 6062759514. Its totient is φ = 455595840.

The previous prime is 1785049787. The next prime is 1785049823. The reversal of 1785049812 is 2189405871.

It can be written as a sum of positive squares in only one way, i.e., 1235803716 + 549246096 = 35154^2 + 23436^2 .

It is a tau number, because it is divible by the number of its divisors (378).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 125 ways as a sum of consecutive naturals, for example, 57582237 + ... + 57582267.

Almost surely, 2^1785049812 is an apocalyptic number.

1785049812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1785049812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3031379757).

1785049812 is an abundant number, since it is smaller than the sum of its proper divisors (4277709702).

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

1785049812 is a wasteful number, since it uses less digits than its factorization.

1785049812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 56 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 45.

The square root of 1785049812 is about 42249.8498458870. The cubic root of 1785049812 is about 1213.0632518516.

The spelling of 1785049812 in words is "one billion, seven hundred eighty-five million, forty-nine thousand, eight hundred twelve".