29217190128 has 40 divisors (see below), whose sum is σ = 86260276608. Its totient is φ = 8347768512.

The previous prime is 29217190117. The next prime is 29217190129. The reversal of 29217190128 is 82109171292.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 29217190128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29217190129) 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, 43477626 + ... + 43478297.

Almost surely, 2^29217190128 is an apocalyptic number.

29217190128 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

29217190128 is an abundant number, since it is smaller than the sum of its proper divisors (57043086480).

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

29217190128 is a wasteful number, since it uses less digits than its factorization.

29217190128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86955941 (or 86955935 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 42.

The spelling of 29217190128 in words is "twenty-nine billion, two hundred seventeen million, one hundred ninety thousand, one hundred twenty-eight".