29889745 has 4 divisors (see below), whose sum is σ = 35867700. Its totient is φ = 23911792.

The previous prime is 29889731. The next prime is 29889751. The reversal of 29889745 is 54798892.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 16516096 + 13373649 = 4064^2 + 3657^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29889745 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 29889692 and 29889701.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2988970 + ... + 2988979.

It is an arithmetic number, because the mean of its divisors is an integer number (8966925).

Almost surely, 2^29889745 is an apocalyptic number.

It is an amenable number.

29889745 is a deficient number, since it is larger than the sum of its proper divisors (5977955).

29889745 is an equidigital number, since it uses as much as digits as its factorization.

29889745 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5977954.

The product of its digits is 1451520, while the sum is 52.

The square root of 29889745 is about 5467.1514520818. The cubic root of 29889745 is about 310.3421300752.

The spelling of 29889745 in words is "twenty-nine million, eight hundred eighty-nine thousand, seven hundred forty-five".