29081940 has 48 divisors (see below), whose sum is σ = 82252800. Its totient is φ = 7676800.

The previous prime is 29081909. The next prime is 29081957. The reversal of 29081940 is 4918092.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 3661 + ... + 8459.

It is an arithmetic number, because the mean of its divisors is an integer number (1713600).

Almost surely, 2^29081940 is an apocalyptic number.

29081940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29081940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41126400).

29081940 is an abundant number, since it is smaller than the sum of its proper divisors (53170860).

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

29081940 is a wasteful number, since it uses less digits than its factorization.

29081940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4912 (or 4910 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 33.

The square root of 29081940 is about 5392.7673786285. The cubic root of 29081940 is about 307.5207732678.

The spelling of 29081940 in words is "twenty-nine million, eighty-one thousand, nine hundred forty".