29798979920 has 40 divisors (see below), whose sum is σ = 69290643240. Its totient is φ = 11918213120.

The previous prime is 29798979893. The next prime is 29798979971. The reversal of 29798979920 is 2997989792.

It can be written as a sum of positive squares in 4 ways, for example, as 260370496 + 29538609424 = 16136^2 + 171868^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-3 number, since 3×29798979920³ (a number of 32 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 941960 + ... + 973080.

It is an arithmetic number, because the mean of its divisors is an integer number (1732266081).

Almost surely, 2^29798979920 is an apocalyptic number.

29798979920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

29798979920 is an abundant number, since it is smaller than the sum of its proper divisors (39491663320).

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

29798979920 is a wasteful number, since it uses less digits than its factorization.

29798979920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43103 (or 43097 counting only the distinct ones).

The product of its (nonzero) digits is 92588832, while the sum is 71.

The spelling of 29798979920 in words is "twenty-nine billion, seven hundred ninety-eight million, nine hundred seventy-nine thousand, nine hundred twenty".