1648634988 has 192 divisors, whose sum is σ = 5272243200. Its totient is φ = 395136000.

The previous prime is 1648634987. The next prime is 1648635029. The reversal of 1648634988 is 8894368461.

It is a super-3 number, since 3×1648634988³ (a number of 29 digits) contains 333 as substring.

It is a zygodrome in base 7.

It is not an unprimeable number, because it can be changed into a prime (1648634987) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 587188 + ... + 589988.

It is an arithmetic number, because the mean of its divisors is an integer number (27459600).

Almost surely, 2^1648634988 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1648634988, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2636121600).

1648634988 is an abundant number, since it is smaller than the sum of its proper divisors (3623608212).

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

1648634988 is a wasteful number, since it uses less digits than its factorization.

1648634988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2853 (or 2837 counting only the distinct ones).

The product of its digits is 7962624, while the sum is 57.

The square root of 1648634988 is about 40603.3864104954. The cubic root of 1648634988 is about 1181.3398044207.

It can be divided in two parts, 1648 and 634988, that added together give a palindrome (636636).

The spelling of 1648634988 in words is "one billion, six hundred forty-eight million, six hundred thirty-four thousand, nine hundred eighty-eight".