29143989 has 32 divisors (see below), whose sum is σ = 50561280. Its totient is φ = 16243200.

The previous prime is 29143987. The next prime is 29143993. The reversal of 29143989 is 98934192.

It is not a de Polignac number, because 29143989 - 2¹ = 29143987 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29143987) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5869 + ... + 9629.

It is an arithmetic number, because the mean of its divisors is an integer number (1580040).

Almost surely, 2^29143989 is an apocalyptic number.

It is an amenable number.

29143989 is a deficient number, since it is larger than the sum of its proper divisors (21417291).

29143989 is a wasteful number, since it uses less digits than its factorization.

29143989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818 (or 3812 counting only the distinct ones).

The product of its digits is 139968, while the sum is 45.

The square root of 29143989 is about 5398.5172964435. The cubic root of 29143989 is about 307.7393258805.

It can be divided in two parts, 2914 and 3989, that added together give a triangular number (6903 = T₁₁₇).

The spelling of 29143989 in words is "twenty-nine million, one hundred forty-three thousand, nine hundred eighty-nine".