1648943904 has 48 divisors (see below), whose sum is σ = 4434060960. Its totient is φ = 536240640.

The previous prime is 1648943873. The next prime is 1648943939. The reversal of 1648943904 is 4093498461.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (48).

It is a super-2 number, since 2×1648943904² = 5438031997077522432, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (48).

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 7 ways as a sum of consecutive naturals, for example, 205534 + ... + 213405.

It is an arithmetic number, because the mean of its divisors is an integer number (92376270).

Almost surely, 2^1648943904 is an apocalyptic number.

It is an amenable number.

1648943904 is an abundant number, since it is smaller than the sum of its proper divisors (2785117056).

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

1648943904 is a wasteful number, since it uses less digits than its factorization.

1648943904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418993 (or 418985 counting only the distinct ones).

The product of its (nonzero) digits is 746496, while the sum is 48.

The square root of 1648943904 is about 40607.1902992561. The cubic root of 1648943904 is about 1181.4135850491.

The spelling of 1648943904 in words is "one billion, six hundred forty-eight million, nine hundred forty-three thousand, nine hundred four".