11772831 has 16 divisors (see below), whose sum is σ = 18144000. Its totient is φ = 6650688.

The previous prime is 11772809. The next prime is 11772833. The reversal of 11772831 is 13827711.

11772831 = 241² + 242² + ... + 366².

It is not a de Polignac number, because 11772831 - 2¹⁸ = 11510687 is a prime.

It is a super-2 number, since 2×11772831² = 277199099509122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11772833) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1281 + ... + 5018.

It is an arithmetic number, because the mean of its divisors is an integer number (1134000).

Almost surely, 2^11772831 is an apocalyptic number.

11772831 is a deficient number, since it is larger than the sum of its proper divisors (6371169).

11772831 is an equidigital number, since it uses as much as digits as its factorization.

11772831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6398.

The product of its digits is 2352, while the sum is 30.

The square root of 11772831 is about 3431.1559276722. The cubic root of 11772831 is about 227.4889484629.

The spelling of 11772831 in words is "eleven million, seven hundred seventy-two thousand, eight hundred thirty-one".