7859629640 has 32 divisors (see below), whose sum is σ = 18254626560. Its totient is φ = 3042436800.

The previous prime is 7859629637. The next prime is 7859629643. The reversal of 7859629640 is 469269587.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (7859629637) and next prime (7859629643).

It is not an unprimeable number, because it can be changed into a prime (7859629643) 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, 3167966 + ... + 3170445.

It is an arithmetic number, because the mean of its divisors is an integer number (570457080).

Almost surely, 2^7859629640 is an apocalyptic number.

It is an amenable number.

7859629640 is an abundant number, since it is smaller than the sum of its proper divisors (10394996920).

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

7859629640 is a wasteful number, since it uses less digits than its factorization.

7859629640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6338453 (or 6338449 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 56.

The square root of 7859629640 is about 88654.5522801847. The cubic root of 7859629640 is about 1988.2333790767.

The spelling of 7859629640 in words is "seven billion, eight hundred fifty-nine million, six hundred twenty-nine thousand, six hundred forty".