29209236540 has 96 divisors (see below), whose sum is σ = 89688453120. Its totient is φ = 7043923200.

The previous prime is 29209236473. The next prime is 29209236559. The reversal of 29209236540 is 4563290292.

It is a junction number, because it is equal to n+sod(n) for n = 29209236492 and 29209236501.

It is a congruent number.

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, 10206 + ... + 241914.

It is an arithmetic number, because the mean of its divisors is an integer number (934254720).

Almost surely, 2^29209236540 is an apocalyptic number.

29209236540 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 29209236540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44844226560).

29209236540 is an abundant number, since it is smaller than the sum of its proper divisors (60479216580).

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

29209236540 is a wasteful number, since it uses less digits than its factorization.

29209236540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 231923 (or 231921 counting only the distinct ones).

The product of its (nonzero) digits is 233280, while the sum is 42.

The spelling of 29209236540 in words is "twenty-nine billion, two hundred nine million, two hundred thirty-six thousand, five hundred forty".