7638487734 has 16 divisors (see below), whose sum is σ = 15280986672. Its totient is φ = 2545494048.

The previous prime is 7638487733. The next prime is 7638487789. The reversal of 7638487734 is 4377848367.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7638487733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 142089 + ... + 188324.

It is an arithmetic number, because the mean of its divisors is an integer number (955061667).

Almost surely, 2^7638487734 is an apocalyptic number.

7638487734 is an abundant number, since it is smaller than the sum of its proper divisors (7642498938).

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

7638487734 is a wasteful number, since it uses less digits than its factorization.

7638487734 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 334271.

The product of its digits is 18966528, while the sum is 57.

The square root of 7638487734 is about 87398.4424003083. The cubic root of 7638487734 is about 1969.4084418610.

The spelling of 7638487734 in words is "seven billion, six hundred thirty-eight million, four hundred eighty-seven thousand, seven hundred thirty-four".