1649463872 has 252 divisors, whose sum is σ = 4236378624. Its totient is φ = 634314240.

The previous prime is 1649463869. The next prime is 1649463901. The reversal of 1649463872 is 2783649461.

It is a self number, because there is not a number n which added to its sum of digits gives 1649463872.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 35094953 + ... + 35094999.

Almost surely, 2^1649463872 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 1649463872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2118189312).

1649463872 is an abundant number, since it is smaller than the sum of its proper divisors (2586914752).

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

1649463872 is a wasteful number, since it uses less digits than its factorization.

1649463872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 142 (or 106 counting only the distinct ones).

The product of its digits is 1741824, while the sum is 50.

The square root of 1649463872 is about 40613.5922075356. The cubic root of 1649463872 is about 1181.5377519374.

The spelling of 1649463872 in words is "one billion, six hundred forty-nine million, four hundred sixty-three thousand, eight hundred seventy-two".