7709229138 has 32 divisors (see below), whose sum is σ = 17478417600. Its totient is φ = 2247224256.

The previous prime is 7709229029. The next prime is 7709229149. The reversal of 7709229138 is 8319229077.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2599473 + ... + 2602436.

It is an arithmetic number, because the mean of its divisors is an integer number (546200550).

Almost surely, 2^7709229138 is an apocalyptic number.

7709229138 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

7709229138 is an abundant number, since it is smaller than the sum of its proper divisors (9769188462).

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

7709229138 is a wasteful number, since it uses less digits than its factorization.

7709229138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5201946.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 7709229138 is about 87802.2160198705. The cubic root of 7709229138 is about 1975.4694510170.

The spelling of 7709229138 in words is "seven billion, seven hundred nine million, two hundred twenty-nine thousand, one hundred thirty-eight".