7385687638 has 64 divisors (see below), whose sum is σ = 14142297600. Its totient is φ = 2816156160.

The previous prime is 7385687627. The next prime is 7385687651. The reversal of 7385687638 is 8367865837.

It is a super-2 number, since 2×7385687638² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2444893 + ... + 2447911.

It is an arithmetic number, because the mean of its divisors is an integer number (220973400).

Almost surely, 2^7385687638 is an apocalyptic number.

7385687638 is a deficient number, since it is larger than the sum of its proper divisors (6756609962).

7385687638 is a wasteful number, since it uses less digits than its factorization.

7385687638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3605.

The product of its digits is 40642560, while the sum is 61.

The square root of 7385687638 is about 85940.0234931315. The cubic root of 7385687638 is about 1947.4380238478.

The spelling of 7385687638 in words is "seven billion, three hundred eighty-five million, six hundred eighty-seven thousand, six hundred thirty-eight".