7688623638 has 16 divisors (see below), whose sum is σ = 16186576320. Its totient is φ = 2427986376.

The previous prime is 7688623633. The next prime is 7688623669. The reversal of 7688623638 is 8363268867.

It is a super-2 number, since 2×7688623638² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (57).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7688623633) 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, 33721920 + ... + 33722147.

It is an arithmetic number, because the mean of its divisors is an integer number (1011661020).

Almost surely, 2^7688623638 is an apocalyptic number.

7688623638 is an abundant number, since it is smaller than the sum of its proper divisors (8497952682).

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

7688623638 is a wasteful number, since it uses less digits than its factorization.

7688623638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67444091.

The product of its digits is 13934592, while the sum is 57.

The square root of 7688623638 is about 87684.7970745214. The cubic root of 7688623638 is about 1973.7078457432.

The spelling of 7688623638 in words is "seven billion, six hundred eighty-eight million, six hundred twenty-three thousand, six hundred thirty-eight".