8534238640 has 20 divisors (see below), whose sum is σ = 19842105024. Its totient is φ = 3413695424.

The previous prime is 8534238631. The next prime is 8534238673. The reversal of 8534238640 is 468324358.

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

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, 53338912 + ... + 53339071.

Almost surely, 2^8534238640 is an apocalyptic number.

8534238640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8534238640 is an abundant number, since it is smaller than the sum of its proper divisors (11307866384).

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

8534238640 is a wasteful number, since it uses less digits than its factorization.

8534238640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106677996 (or 106677990 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 43.

The square root of 8534238640 is about 92380.9430564551. The cubic root of 8534238640 is about 2043.5640822689.

The spelling of 8534238640 in words is "eight billion, five hundred thirty-four million, two hundred thirty-eight thousand, six hundred forty".