28098766332 has 144 divisors (see below), whose sum is σ = 87660332032. Its totient is φ = 7390154880.

The previous prime is 28098766309. The next prime is 28098766357. The reversal of 28098766332 is 23366789082.

It is a happy number.

It is a congruent number.

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, 1190607 + ... + 1213977.

Almost surely, 2^28098766332 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28098766332, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43830166016).

28098766332 is an abundant number, since it is smaller than the sum of its proper divisors (59561565700).

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

28098766332 is a wasteful number, since it uses less digits than its factorization.

28098766332 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23768 (or 23763 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

It can be divided in two parts, 28098 and 766332, that added together give a triangular number (794430 = T₁₂₆₀).

The spelling of 28098766332 in words is "twenty-eight billion, ninety-eight million, seven hundred sixty-six thousand, three hundred thirty-two".