29400921 has 16 divisors (see below), whose sum is σ = 47517120. Its totient is φ = 17818560.

The previous prime is 29400913. The next prime is 29400937. The reversal of 29400921 is 12900492.

It is not a de Polignac number, because 29400921 - 2³ = 29400913 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (29400901) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 49200 + ... + 49793.

It is an arithmetic number, because the mean of its divisors is an integer number (2969820).

Almost surely, 2^29400921 is an apocalyptic number.

It is an amenable number.

29400921 is a deficient number, since it is larger than the sum of its proper divisors (18116199).

29400921 is a wasteful number, since it uses less digits than its factorization.

29400921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 99013 (or 99007 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 29400921 is about 5422.2616130172. The cubic root of 29400921 is about 308.6410196327.

The spelling of 29400921 in words is "twenty-nine million, four hundred thousand, nine hundred twenty-one".