29728147 has 8 divisors (see below), whose sum is σ = 30071376. Its totient is φ = 29387232.

The previous prime is 29728129. The next prime is 29728183. The reversal of 29728147 is 74182792.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29728147 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (29728187) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38893 + ... + 39649.

It is an arithmetic number, because the mean of its divisors is an integer number (3758922).

Almost surely, 2^29728147 is an apocalyptic number.

29728147 is a deficient number, since it is larger than the sum of its proper divisors (343229).

29728147 is a wasteful number, since it uses less digits than its factorization.

29728147 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1157.

The product of its digits is 56448, while the sum is 40.

The square root of 29728147 is about 5452.3524280809. The cubic root of 29728147 is about 309.7818340123.

The spelling of 29728147 in words is "twenty-nine million, seven hundred twenty-eight thousand, one hundred forty-seven".