648921922 has 16 divisors (see below), whose sum is σ = 1098489600. Its totient is φ = 284793040.

The previous prime is 648921919. The next prime is 648921941. The reversal of 648921922 is 229129846.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 507922 + ... + 509197.

It is an arithmetic number, because the mean of its divisors is an integer number (68655600).

Almost surely, 2^648921922 is an apocalyptic number.

648921922 is a deficient number, since it is larger than the sum of its proper divisors (449567678).

648921922 is a wasteful number, since it uses less digits than its factorization.

648921922 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1017161.

The product of its digits is 124416, while the sum is 43.

The square root of 648921922 is about 25473.9459448276. The cubic root of 648921922 is about 865.7599309306.

The spelling of 648921922 in words is "six hundred forty-eight million, nine hundred twenty-one thousand, nine hundred twenty-two".