819507648 has 28 divisors (see below), whose sum is σ = 2168281160. Its totient is φ = 273169152.

The previous prime is 819507643. The next prime is 819507659. The reversal of 819507648 is 846705918.

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

It is a junction number, because it is equal to n+sod(n) for n = 819507597 and 819507606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (819507643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2133943 + ... + 2134326.

Almost surely, 2^819507648 is an apocalyptic number.

It is an amenable number.

819507648 is an abundant number, since it is smaller than the sum of its proper divisors (1348773512).

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

819507648 is a wasteful number, since it uses less digits than its factorization.

819507648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4268284 (or 4268274 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 48.

The square root of 819507648 is about 28627.0439968922. The cubic root of 819507648 is about 935.8027928456.

It can be divided in two parts, 81950 and 7648, that added together give a palindrome (89598).

The spelling of 819507648 in words is "eight hundred nineteen million, five hundred seven thousand, six hundred forty-eight".