1649009420 has 12 divisors (see below), whose sum is σ = 3462919824. Its totient is φ = 659603760.

The previous prime is 1649009413. The next prime is 1649009431. The reversal of 1649009420 is 249009461.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41225216 + ... + 41225255.

It is an arithmetic number, because the mean of its divisors is an integer number (288576652).

Almost surely, 2^1649009420 is an apocalyptic number.

1649009420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1649009420 is an abundant number, since it is smaller than the sum of its proper divisors (1813910404).

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

1649009420 is a wasteful number, since it uses less digits than its factorization.

1649009420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82450480 (or 82450478 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 35.

The square root of 1649009420 is about 40607.9969956658. The cubic root of 1649009420 is about 1181.4292315218.

The spelling of 1649009420 in words is "one billion, six hundred forty-nine million, nine thousand, four hundred twenty".