29691090 has 128 divisors (see below), whose sum is σ = 93139200. Its totient is φ = 6635520.

The previous prime is 29691083. The next prime is 29691121. The reversal of 29691090 is 9019692.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 38226 + ... + 38994.

It is an arithmetic number, because the mean of its divisors is an integer number (727650).

Almost surely, 2^29691090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29691090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46569600).

29691090 is an abundant number, since it is smaller than the sum of its proper divisors (63448110).

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

29691090 is a wasteful number, since it uses less digits than its factorization.

29691090 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809 (or 803 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 29691090 is about 5448.9531104608. The cubic root of 29691090 is about 309.6530631361.

The spelling of 29691090 in words is "twenty-nine million, six hundred ninety-one thousand, ninety".