8510238640 has 20 divisors (see below), whose sum is σ = 19786305024. Its totient is φ = 3404095424.

The previous prime is 8510238617. The next prime is 8510238691. The reversal of 8510238640 is 468320158.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 8510238640.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 53188912 + ... + 53189071.

Almost surely, 2^8510238640 is an apocalyptic number.

8510238640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8510238640 is an abundant number, since it is smaller than the sum of its proper divisors (11276066384).

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

8510238640 is a wasteful number, since it uses less digits than its factorization.

8510238640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106377996 (or 106377990 counting only the distinct ones).

The product of its (nonzero) digits is 46080, while the sum is 37.

The square root of 8510238640 is about 92250.9546834069. The cubic root of 8510238640 is about 2041.6466456420.

Adding to 8510238640 its reverse (468320158), we get a palindrome (8978558798).

The spelling of 8510238640 in words is "eight billion, five hundred ten million, two hundred thirty-eight thousand, six hundred forty".