29807145 has 24 divisors (see below), whose sum is σ = 51799176. Its totient is φ = 15856128.

The previous prime is 29807119. The next prime is 29807159. The reversal of 29807145 is 54170892.

It can be written as a sum of positive squares in 4 ways, for example, as 257049 + 29550096 = 507^2 + 5436^2 .

It is not a de Polignac number, because 29807145 - 2⁷ = 29807017 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 26127 + ... + 27243.

It is an arithmetic number, because the mean of its divisors is an integer number (2158299).

Almost surely, 2^29807145 is an apocalyptic number.

It is an amenable number.

29807145 is a deficient number, since it is larger than the sum of its proper divisors (21992031).

29807145 is a wasteful number, since it uses less digits than its factorization.

29807145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1721 (or 1718 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The square root of 29807145 is about 5459.5920177244. The cubic root of 29807145 is about 310.0559905804.

It can be divided in two parts, 298071 and 45, that added together give a square (298116 = 546²).

The spelling of 29807145 in words is "twenty-nine million, eight hundred seven thousand, one hundred forty-five".