1649028864 has 72 divisors (see below), whose sum is σ = 5015812480. Its totient is φ = 471149568.

The previous prime is 1649028817. The next prime is 1649028881. The reversal of 1649028864 is 4688209461.

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

It is a congruent number.

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, 147994 + ... + 158745.

Almost surely, 2^1649028864 is an apocalyptic number.

1649028864 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1649028864 is an abundant number, since it is smaller than the sum of its proper divisors (3366783616).

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

1649028864 is an equidigital number, since it uses as much as digits as its factorization.

1649028864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 306765 (or 306751 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 1649028864 is about 40608.2364059312. The cubic root of 1649028864 is about 1181.4338750408.

It can be divided in two parts, 16490 and 28864, that added together give a palindrome (45354).

The spelling of 1649028864 in words is "one billion, six hundred forty-nine million, twenty-eight thousand, eight hundred sixty-four".