10201780 has 12 divisors (see below), whose sum is σ = 21423780. Its totient is φ = 4080704.

The previous prime is 10201769. The next prime is 10201799. The reversal of 10201780 is 8710201.

It can be written as a sum of positive squares in 2 ways, for example, as 3709476 + 6492304 = 1926^2 + 2548^2 .

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 255025 + ... + 255064.

It is an arithmetic number, because the mean of its divisors is an integer number (1785315).

Almost surely, 2^10201780 is an apocalyptic number.

10201780 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

10201780 is an abundant number, since it is smaller than the sum of its proper divisors (11222000).

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

10201780 is a wasteful number, since it uses less digits than its factorization.

10201780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 510098 (or 510096 counting only the distinct ones).

The product of its (nonzero) digits is 112, while the sum is 19.

The square root of 10201780 is about 3194.0225421872. The cubic root of 10201780 is about 216.8829031218.

Adding to 10201780 its reverse (8710201), we get a palindrome (18911981).

The spelling of 10201780 in words is "ten million, two hundred one thousand, seven hundred eighty".