29428939 has 16 divisors (see below), whose sum is σ = 31842720. Its totient is φ = 27139840.

The previous prime is 29428913. The next prime is 29428943. The reversal of 29428939 is 93982492.

It is a cyclic number.

It is not a de Polignac number, because 29428939 - 2¹³ = 29420747 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29428979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62784 + ... + 63250.

It is an arithmetic number, because the mean of its divisors is an integer number (1990170).

Almost surely, 2^29428939 is an apocalyptic number.

29428939 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

29428939 is a deficient number, since it is larger than the sum of its proper divisors (2413781).

29428939 is a wasteful number, since it uses less digits than its factorization.

29428939 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 590.

The product of its digits is 279936, while the sum is 46.

The square root of 29428939 is about 5424.8446060694. The cubic root of 29428939 is about 308.7390296987.

It can be divided in two parts, 2942 and 8939, that added together give a square (11881 = 109²).

The spelling of 29428939 in words is "twenty-nine million, four hundred twenty-eight thousand, nine hundred thirty-nine".