7689639438 has 24 divisors (see below), whose sum is σ = 17942492568. Its totient is φ = 2366042832.

The previous prime is 7689639437. The next prime is 7689639439. The reversal of 7689639438 is 8349369867.

It is an interprime number because it is at equal distance from previous prime (7689639437) and next prime (7689639439).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7689639437) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16430620 + ... + 16431087.

It is an arithmetic number, because the mean of its divisors is an integer number (747603857).

Almost surely, 2^7689639438 is an apocalyptic number.

7689639438 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7689639438 is an abundant number, since it is smaller than the sum of its proper divisors (10252853130).

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

7689639438 is a wasteful number, since it uses less digits than its factorization.

7689639438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32861728 (or 32861725 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 63.

The square root of 7689639438 is about 87690.5892214210. The cubic root of 7689639438 is about 1973.7947622160.

The spelling of 7689639438 in words is "seven billion, six hundred eighty-nine million, six hundred thirty-nine thousand, four hundred thirty-eight".