4397661492 has 96 divisors (see below), whose sum is σ = 12678113280. Its totient is φ = 1158157440.

The previous prime is 4397661481. The next prime is 4397661493. The reversal of 4397661492 is 2941667934.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4397661493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 21817 + ... + 96287.

It is an arithmetic number, because the mean of its divisors is an integer number (132063680).

Almost surely, 2^4397661492 is an apocalyptic number.

4397661492 is a gapful number since it is divisible by the number (42) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 4397661492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6339056640).

4397661492 is an abundant number, since it is smaller than the sum of its proper divisors (8280451788).

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

4397661492 is a wasteful number, since it uses less digits than its factorization.

4397661492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74541 (or 74539 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 51.

The square root of 4397661492 is about 66314.8662970830. The cubic root of 4397661492 is about 1638.3521883403.

The spelling of 4397661492 in words is "four billion, three hundred ninety-seven million, six hundred sixty-one thousand, four hundred ninety-two".