29890985 has 8 divisors (see below), whose sum is σ = 36205056. Its totient is φ = 23688880.

The previous prime is 29890979. The next prime is 29890997. The reversal of 29890985 is 58909892.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 29890985 - 2⁴ = 29890969 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a Duffinian number.

It is a Curzon number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 27401 + ... + 28470.

It is an arithmetic number, because the mean of its divisors is an integer number (4525632).

Almost surely, 2^29890985 is an apocalyptic number.

It is an amenable number.

29890985 is a deficient number, since it is larger than the sum of its proper divisors (6314071).

29890985 is a wasteful number, since it uses less digits than its factorization.

29890985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55983.

The product of its (nonzero) digits is 466560, while the sum is 50.

The square root of 29890985 is about 5467.2648554830. The cubic root of 29890985 is about 310.3464216131.

The spelling of 29890985 in words is "twenty-nine million, eight hundred ninety thousand, nine hundred eighty-five".