1021658648 has 16 divisors (see below), whose sum is σ = 1934209680. Its totient is φ = 505869408.

The previous prime is 1021658609. The next prime is 1021658653. The reversal of 1021658648 is 8468561201.

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, 619115 + ... + 620762.

It is an arithmetic number, because the mean of its divisors is an integer number (120888105).

Almost surely, 2^1021658648 is an apocalyptic number.

It is an amenable number.

1021658648 is a deficient number, since it is larger than the sum of its proper divisors (912551032).

1021658648 is a wasteful number, since it uses less digits than its factorization.

1021658648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1239986 (or 1239982 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 1021658648 is about 31963.3954391582. The cubic root of 1021658648 is about 1007.1680456875.

The spelling of 1021658648 in words is "one billion, twenty-one million, six hundred fifty-eight thousand, six hundred forty-eight".