29117408040 has 768 divisors, whose sum is σ = 120086323200. Its totient is φ = 6143786496.

The previous prime is 29117408017. The next prime is 29117408077. The reversal of 29117408040 is 4080471192.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 29117407986 and 29117408004.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 128270407 + ... + 128270633.

It is an arithmetic number, because the mean of its divisors is an integer number (156362400).

Almost surely, 2^29117408040 is an apocalyptic number.

29117408040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29117408040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60043161600).

29117408040 is an abundant number, since it is smaller than the sum of its proper divisors (90968915160).

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

29117408040 is a wasteful number, since it uses less digits than its factorization.

29117408040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 339 (or 310 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The spelling of 29117408040 in words is "twenty-nine billion, one hundred seventeen million, four hundred eight thousand, forty".