29978378250 has 128 divisors (see below), whose sum is σ = 78217850880. Its totient is φ = 7633102400.

The previous prime is 29978378207. The next prime is 29978378257. The reversal of 29978378250 is 5287387992.

It is not an unprimeable number, because it can be changed into a prime (29978378257) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 12815581 + ... + 12817919.

It is an arithmetic number, because the mean of its divisors is an integer number (611076960).

Almost surely, 2^29978378250 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 29978378250, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39108925440).

29978378250 is an abundant number, since it is smaller than the sum of its proper divisors (48239472630).

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

29978378250 is a wasteful number, since it uses less digits than its factorization.

29978378250 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3125 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 29978378250 in words is "twenty-nine billion, nine hundred seventy-eight million, three hundred seventy-eight thousand, two hundred fifty".