3668137728 has 36 divisors (see below), whose sum is σ = 9762597768. Its totient is φ = 1222712320.

The previous prime is 3668137723. The next prime is 3668137757. The reversal of 3668137728 is 8277318663.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3668137721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2387343 + ... + 2388878.

Almost surely, 2^3668137728 is an apocalyptic number.

It is an amenable number.

3668137728 is an abundant number, since it is smaller than the sum of its proper divisors (6094460040).

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

3668137728 is an equidigital number, since it uses as much as digits as its factorization.

3668137728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4776240 (or 4776226 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The square root of 3668137728 is about 60565.1527530477. The cubic root of 3668137728 is about 1542.2278611058.

The spelling of 3668137728 in words is "three billion, six hundred sixty-eight million, one hundred thirty-seven thousand, seven hundred twenty-eight".