29309997900 has 144 divisors (see below), whose sum is σ = 85517026560. Its totient is φ = 7750560000.

The previous prime is 29309997889. The next prime is 29309997923. The reversal of 29309997900 is 979990392.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 20254977 + ... + 20256423.

It is an arithmetic number, because the mean of its divisors is an integer number (593868240).

Almost surely, 2^29309997900 is an apocalyptic number.

29309997900 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 29309997900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42758513280).

29309997900 is an abundant number, since it is smaller than the sum of its proper divisors (56207028660).

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

29309997900 is a wasteful number, since it uses less digits than its factorization.

29309997900 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1984 (or 1977 counting only the distinct ones).

The product of its (nonzero) digits is 2480058, while the sum is 57.

The spelling of 29309997900 in words is "twenty-nine billion, three hundred nine million, nine hundred ninety-seven thousand, nine hundred".