3657420648 has 128 divisors (see below), whose sum is σ = 11637043200. Its totient is φ = 1042621632.

The previous prime is 3657420631. The next prime is 3657420653. The reversal of 3657420648 is 8460247563.

3657420648 is a `hidden beast` number, since 36 + 574 + 2 + 0 + 6 + 48 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 733861 + ... + 738827.

It is an arithmetic number, because the mean of its divisors is an integer number (90914400).

Almost surely, 2^3657420648 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 3657420648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5818521600).

3657420648 is an abundant number, since it is smaller than the sum of its proper divisors (7979622552).

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

3657420648 is a wasteful number, since it uses less digits than its factorization.

3657420648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5476 (or 5466 counting only the distinct ones).

The product of its (nonzero) digits is 967680, while the sum is 45.

The square root of 3657420648 is about 60476.6124051273. The cubic root of 3657420648 is about 1540.7244368083.

The spelling of 3657420648 in words is "three billion, six hundred fifty-seven million, four hundred twenty thousand, six hundred forty-eight".