12261788 has 48 divisors (see below), whose sum is σ = 27433728. Its totient is φ = 4656000.

The previous prime is 12261713. The next prime is 12261791. The reversal of 12261788 is 88716221.

It is a Smith number, since the sum of its digits (35) coincides with the sum of the digits of its prime factors.

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, 12143 + ... + 13113.

It is an arithmetic number, because the mean of its divisors is an integer number (571536).

Almost surely, 2^12261788 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 12261788, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13716864).

12261788 is an abundant number, since it is smaller than the sum of its proper divisors (15171940).

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

12261788 is a wasteful number, since it uses less digits than its factorization.

12261788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034 (or 1032 counting only the distinct ones).

The product of its digits is 10752, while the sum is 35.

The square root of 12261788 is about 3501.6835950725. The cubic root of 12261788 is about 230.5957335140.

It can be divided in two parts, 1226178 and 8, that multiplied together give a square (9809424 = 3132²).

The spelling of 12261788 in words is "twelve million, two hundred sixty-one thousand, seven hundred eighty-eight".