29138889 has 16 divisors (see below), whose sum is σ = 42050624. Its totient is φ = 17841600.

The previous prime is 29138839. The next prime is 29138891. The reversal of 29138889 is 98883192.

It is a happy number.

It is not a de Polignac number, because 29138889 - 2⁹ = 29138377 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29138839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6459 + ... + 9999.

It is an arithmetic number, because the mean of its divisors is an integer number (2628164).

Almost surely, 2^29138889 is an apocalyptic number.

It is an amenable number.

29138889 is a deficient number, since it is larger than the sum of its proper divisors (12911735).

29138889 is a wasteful number, since it uses less digits than its factorization.

29138889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3768.

The product of its digits is 248832, while the sum is 48.

The square root of 29138889 is about 5398.0449238590. The cubic root of 29138889 is about 307.7213740698.

The spelling of 29138889 in words is "twenty-nine million, one hundred thirty-eight thousand, eight hundred eighty-nine".