29121090 has 64 divisors (see below), whose sum is σ = 72963072. Its totient is φ = 7430400.

The previous prime is 29121089. The next prime is 29121101. The reversal of 29121090 is 9012192.

It is a self number, because there is not a number n which added to its sum of digits gives 29121090.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 160800 + ... + 160980.

It is an arithmetic number, because the mean of its divisors is an integer number (1140048).

Almost surely, 2^29121090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29121090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36481536).

29121090 is an abundant number, since it is smaller than the sum of its proper divisors (43841982).

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

29121090 is a wasteful number, since it uses less digits than its factorization.

29121090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 395.

The product of its (nonzero) digits is 324, while the sum is 24.

The square root of 29121090 is about 5396.3960195671. The cubic root of 29121090 is about 307.6587058338.

The spelling of 29121090 in words is "twenty-nine million, one hundred twenty-one thousand, ninety".