11781030 has 32 divisors (see below), whose sum is σ = 28677888. Its totient is φ = 3096800.

The previous prime is 11781013. The next prime is 11781043. The reversal of 11781030 is 3018711.

11781030 = 161² + 162² + ... + 340².

It is a junction number, because it is equal to n+sod(n) for n = 11780988 and 11781006.

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 15 ways as a sum of consecutive naturals, for example, 636 + ... + 4895.

It is an arithmetic number, because the mean of its divisors is an integer number (896184).

Almost surely, 2^11781030 is an apocalyptic number.

11781030 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

11781030 is an abundant number, since it is smaller than the sum of its proper divisors (16896858).

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

11781030 is a wasteful number, since it uses less digits than its factorization.

11781030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5612.

The product of its (nonzero) digits is 168, while the sum is 21.

The square root of 11781030 is about 3432.3505065771. The cubic root of 11781030 is about 227.5417465555.

Adding to 11781030 its reverse (3018711), we get a palindrome (14799741).

The spelling of 11781030 in words is "eleven million, seven hundred eighty-one thousand, thirty".