1869307648 has 54 divisors (see below), whose sum is σ = 4040509704. Its totient is φ = 862737408.

The previous prime is 1869307637. The next prime is 1869307651. The reversal of 1869307648 is 8467039681.

It is a happy number.

It is a super-2 number, since 2×1869307648² = 6988622165742583808, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a junction number, because it is equal to n+sod(n) for n = 1869307595 and 1869307604.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21661 + ... + 64867.

Almost surely, 2^1869307648 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 1869307648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2020254852).

1869307648 is an abundant number, since it is smaller than the sum of its proper divisors (2171202056).

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

1869307648 is an equidigital number, since it uses as much as digits as its factorization.

1869307648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43249 (or 43222 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 1869307648 is about 43235.4906066764. The cubic root of 1869307648 is about 1231.8569013533.

The spelling of 1869307648 in words is "one billion, eight hundred sixty-nine million, three hundred seven thousand, six hundred forty-eight".