28962219945780 has 144 divisors (see below), whose sum is σ = 95857374412800. Its totient is φ = 7019770187520.

The previous prime is 28962219945739. The next prime is 28962219945781. The reversal of 28962219945780 is 8754991226982.

28962219945780 is a `hidden beast` number, since 2 + 8 + 9 + 6 + 2 + 2 + 1 + 99 + 457 + 80 = 666.

It is a super-2 number, since 2×28962219945780² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28962219945699 and 28962219945708.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28962219945781) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8706886 + ... + 11564354.

It is an arithmetic number, because the mean of its divisors is an integer number (665676211200).

Almost surely, 2^{28962219945780} is an apocalyptic number.

28962219945780 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 28962219945780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47928687206400).

28962219945780 is an abundant number, since it is smaller than the sum of its proper divisors (66895154467020).

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

28962219945780 is a wasteful number, since it uses less digits than its factorization.

28962219945780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2862614 (or 2862609 counting only the distinct ones).

The product of its (nonzero) digits is 313528320, while the sum is 72.

The spelling of 28962219945780 in words is "twenty-eight trillion, nine hundred sixty-two billion, two hundred nineteen million, nine hundred forty-five thousand, seven hundred eighty".