3661992 has 48 divisors (see below), whose sum is σ = 10008180. Its totient is φ = 1209600.

The previous prime is 3661979. The next prime is 3662011. The reversal of 3661992 is 2991663.

3661992 is a `hidden beast` number, since 36 + 619 + 9 + 2 = 666.

3661992 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 3437316 + 224676 = 1854^2 + 474^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12892 + ... + 13172.

Almost surely, 2^3661992 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 3661992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5004090).

3661992 is an abundant number, since it is smaller than the sum of its proper divisors (6346188).

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

3661992 is a wasteful number, since it uses less digits than its factorization.

3661992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 467 counting only the distinct ones).

The product of its digits is 17496, while the sum is 36.

The square root of 3661992 is about 1913.6331936920. The cubic root of 3661992 is about 154.1366078561.

The spelling of 3661992 in words is "three million, six hundred sixty-one thousand, nine hundred ninety-two".