8742262640 has 20 divisors (see below), whose sum is σ = 20325760824. Its totient is φ = 3496905024.

The previous prime is 8742262621. The next prime is 8742262649. The reversal of 8742262640 is 462622478.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8742262649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 54639062 + ... + 54639221.

Almost surely, 2^8742262640 is an apocalyptic number.

8742262640 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

8742262640 is an abundant number, since it is smaller than the sum of its proper divisors (11583498184).

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

8742262640 is a wasteful number, since it uses less digits than its factorization.

8742262640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 109278296 (or 109278290 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 41.

The square root of 8742262640 is about 93500.0675935585. The cubic root of 8742262640 is about 2060.0350828223.

The spelling of 8742262640 in words is "eight billion, seven hundred forty-two million, two hundred sixty-two thousand, six hundred forty".