29188428 has 24 divisors (see below), whose sum is σ = 68228160. Its totient is φ = 9712080.

The previous prime is 29188417. The next prime is 29188441. The reversal of 29188428 is 82488192.

It is a super-2 number, since 2×29188428² = 1703928658222368, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 29188428.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 6063 + ... + 9753.

It is an arithmetic number, because the mean of its divisors is an integer number (2842840).

Almost surely, 2^29188428 is an apocalyptic number.

It is an amenable number.

29188428 is an abundant number, since it is smaller than the sum of its proper divisors (39039732).

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

29188428 is a wasteful number, since it uses less digits than its factorization.

29188428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4357 (or 4355 counting only the distinct ones).

The product of its digits is 73728, while the sum is 42.

The square root of 29188428 is about 5402.6315809983. The cubic root of 29188428 is about 307.8956609528.

The spelling of 29188428 in words is "twenty-nine million, one hundred eighty-eight thousand, four hundred twenty-eight".