28899239850 has 144 divisors (see below), whose sum is σ = 84130886112. Its totient is φ = 7069783680.

The previous prime is 28899239839. The next prime is 28899239851. The reversal of 28899239850 is 5893299882.

It is not an unprimeable number, because it can be changed into a prime (28899239851) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 938397 + ... + 968703.

Almost surely, 2^28899239850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28899239850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42065443056).

28899239850 is an abundant number, since it is smaller than the sum of its proper divisors (55231646262).

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

28899239850 is a wasteful number, since it uses less digits than its factorization.

28899239850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30501 (or 30493 counting only the distinct ones).

The product of its (nonzero) digits is 22394880, while the sum is 63.

The spelling of 28899239850 in words is "twenty-eight billion, eight hundred ninety-nine million, two hundred thirty-nine thousand, eight hundred fifty".