649443570 has 32 divisors (see below), whose sum is σ = 1560746880. Its totient is φ = 172953600.

The previous prime is 649443563. The next prime is 649443581. The reversal of 649443570 is 75344946.

It is a super-2 number, since 2×649443570² = 843553901228689800, which contains 22 as substring.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 8995 + ... + 37145.

It is an arithmetic number, because the mean of its divisors is an integer number (48773340).

Almost surely, 2^649443570 is an apocalyptic number.

649443570 is an abundant number, since it is smaller than the sum of its proper divisors (911303310).

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

649443570 is a wasteful number, since it uses less digits than its factorization.

649443570 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28930.

The product of its (nonzero) digits is 362880, while the sum is 42.

The square root of 649443570 is about 25484.1827414575. The cubic root of 649443570 is about 865.9918545566.

The spelling of 649443570 in words is "six hundred forty-nine million, four hundred forty-three thousand, five hundred seventy".