1648789400 has 24 divisors (see below), whose sum is σ = 3833435820. Its totient is φ = 659515680.

The previous prime is 1648789393. The next prime is 1648789427. The reversal of 1648789400 is 49878461.

It is a congruent number.

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 5 ways as a sum of consecutive naturals, for example, 4121774 + ... + 4122173.

Almost surely, 2^1648789400 is an apocalyptic number.

1648789400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1648789400 is an abundant number, since it is smaller than the sum of its proper divisors (2184646420).

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

1648789400 is a wasteful number, since it uses less digits than its factorization.

1648789400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8243963 (or 8243954 counting only the distinct ones).

The product of its (nonzero) digits is 387072, while the sum is 47.

The square root of 1648789400 is about 40605.2878329904. The cubic root of 1648789400 is about 1181.3766849004.

The spelling of 1648789400 in words is "one billion, six hundred forty-eight million, seven hundred eighty-nine thousand, four hundred".