29309985 has 16 divisors (see below), whose sum is σ = 52106880. Its totient is φ = 15631920.

The previous prime is 29309977. The next prime is 29309993. The reversal of 29309985 is 58990392.

It is an interprime number because it is at equal distance from previous prime (29309977) and next prime (29309993).

It is not a de Polignac number, because 29309985 - 2³ = 29309977 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 29309985.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108421 + ... + 108690.

It is an arithmetic number, because the mean of its divisors is an integer number (3256680).

Almost surely, 2^29309985 is an apocalyptic number.

It is an amenable number.

29309985 is a deficient number, since it is larger than the sum of its proper divisors (22796895).

29309985 is a wasteful number, since it uses less digits than its factorization.

29309985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 217125 (or 217119 counting only the distinct ones).

The product of its (nonzero) digits is 174960, while the sum is 45.

The square root of 29309985 is about 5413.8696881251. The cubic root of 29309985 is about 308.3224857802.

The spelling of 29309985 in words is "twenty-nine million, three hundred nine thousand, nine hundred eighty-five".