29947128 has 16 divisors (see below), whose sum is σ = 74867880. Its totient is φ = 9982368.

The previous prime is 29947117. The next prime is 29947129. The reversal of 29947128 is 82174992.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 29947128.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29947129) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623875 + ... + 623922.

Almost surely, 2^29947128 is an apocalyptic number.

It is an amenable number.

29947128 is an abundant number, since it is smaller than the sum of its proper divisors (44920752).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

29947128 is a wasteful number, since it uses less digits than its factorization.

29947128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1247806 (or 1247802 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 29947128 is about 5472.3969154293. The cubic root of 29947128 is about 310.5406037021.

The spelling of 29947128 in words is "twenty-nine million, nine hundred forty-seven thousand, one hundred twenty-eight".