29220894640 has 160 divisors (see below), whose sum is σ = 81381934080. Its totient is φ = 9540191232.

The previous prime is 29220894631. The next prime is 29220894671. The reversal of 29220894640 is 4649802292.

It is a Harshad number since it is a multiple of its sum of digits (46).

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, 2944567 + ... + 2954473.

It is an arithmetic number, because the mean of its divisors is an integer number (508637088).

Almost surely, 2^29220894640 is an apocalyptic number.

29220894640 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 29220894640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40690967040).

29220894640 is an abundant number, since it is smaller than the sum of its proper divisors (52161039440).

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

29220894640 is a wasteful number, since it uses less digits than its factorization.

29220894640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10179 (or 10173 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 46.

The spelling of 29220894640 in words is "twenty-nine billion, two hundred twenty million, eight hundred ninety-four thousand, six hundred forty".