648815622 has 32 divisors (see below), whose sum is σ = 1597085952. Its totient is φ = 171116064.

The previous prime is 648815597. The next prime is 648815669. The reversal of 648815622 is 226518846.

It is a super-2 number, since 2×648815622² = 841923422702493768, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 593608 + ... + 594699.

It is an arithmetic number, because the mean of its divisors is an integer number (49908936).

Almost surely, 2^648815622 is an apocalyptic number.

648815622 is an abundant number, since it is smaller than the sum of its proper divisors (948270330).

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

648815622 is a wasteful number, since it uses less digits than its factorization.

648815622 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1188332.

The product of its digits is 184320, while the sum is 42.

The square root of 648815622 is about 25471.8594138708. The cubic root of 648815622 is about 865.7126549265.

The spelling of 648815622 in words is "six hundred forty-eight million, eight hundred fifteen thousand, six hundred twenty-two".