3642647128 has 16 divisors (see below), whose sum is σ = 6834929760. Its totient is φ = 1819999200.

The previous prime is 3642647087. The next prime is 3642647131. The reversal of 3642647128 is 8217462463.

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, 153808 + ... + 175903.

It is an arithmetic number, because the mean of its divisors is an integer number (427183110).

Almost surely, 2^3642647128 is an apocalyptic number.

It is an amenable number.

3642647128 is a deficient number, since it is larger than the sum of its proper divisors (3192282632).

3642647128 is a wasteful number, since it uses less digits than its factorization.

3642647128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 331098 (or 331094 counting only the distinct ones).

The product of its digits is 387072, while the sum is 43.

The square root of 3642647128 is about 60354.3463886405. The cubic root of 3642647128 is about 1538.6471404422.

The spelling of 3642647128 in words is "three billion, six hundred forty-two million, six hundred forty-seven thousand, one hundred twenty-eight".