11772820 has 12 divisors (see below), whose sum is σ = 24722964. Its totient is φ = 4709120.

The previous prime is 11772809. The next prime is 11772833. The reversal of 11772820 is 2827711.

11772820 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 4866436 + 6906384 = 2206^2 + 2628^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 294301 + ... + 294340.

It is an arithmetic number, because the mean of its divisors is an integer number (2060247).

Almost surely, 2^11772820 is an apocalyptic number.

11772820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

11772820 is an abundant number, since it is smaller than the sum of its proper divisors (12950144).

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

11772820 is a wasteful number, since it uses less digits than its factorization.

11772820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 588650 (or 588648 counting only the distinct ones).

The product of its (nonzero) digits is 1568, while the sum is 28.

The square root of 11772820 is about 3431.1543247135. The cubic root of 11772820 is about 227.4888776111.

The spelling of 11772820 in words is "eleven million, seven hundred seventy-two thousand, eight hundred twenty".