648436446 has 48 divisors (see below), whose sum is σ = 1690166400. Its totient is φ = 175515984.

The previous prime is 648436441. The next prime is 648436489. The reversal of 648436446 is 644634846.

It is a super-2 number, since 2×648436446² = 840939649002221832, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (648436441) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 133036 + ... + 137823.

It is an arithmetic number, because the mean of its divisors is an integer number (35211800).

Almost surely, 2^648436446 is an apocalyptic number.

648436446 is an abundant number, since it is smaller than the sum of its proper divisors (1041729954).

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

648436446 is a wasteful number, since it uses less digits than its factorization.

648436446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 270893 (or 270890 counting only the distinct ones).

The product of its digits is 1327104, while the sum is 45.

The square root of 648436446 is about 25464.4152887907. The cubic root of 648436446 is about 865.5439776129.

It can be divided in two parts, 64843 and 6446, that added together give a square (71289 = 267²).

The spelling of 648436446 in words is "six hundred forty-eight million, four hundred thirty-six thousand, four hundred forty-six".