29903128 has 16 divisors (see below), whose sum is σ = 58506480. Its totient is φ = 14301408.

The previous prime is 29903101. The next prime is 29903129. The reversal of 29903128 is 82130992.

It is a junction number, because it is equal to n+sod(n) for n = 29903093 and 29903102.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29903129) 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, 81075 + ... + 81442.

It is an arithmetic number, because the mean of its divisors is an integer number (3656655).

Almost surely, 2^29903128 is an apocalyptic number.

It is an amenable number.

29903128 is a deficient number, since it is larger than the sum of its proper divisors (28603352).

29903128 is a wasteful number, since it uses less digits than its factorization.

29903128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 162546 (or 162542 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 34.

The square root of 29903128 is about 5468.3752614465. The cubic root of 29903128 is about 310.3884412655.

The spelling of 29903128 in words is "twenty-nine million, nine hundred three thousand, one hundred twenty-eight".