220431491280 has 480 divisors, whose sum is σ = 993948883200. Its totient is φ = 42280427520.

The previous prime is 220431491249. The next prime is 220431491299. The reversal of 220431491280 is 82194134022.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 567796 + ... + 873644.

It is an arithmetic number, because the mean of its divisors is an integer number (2070726840).

Almost surely, 2^220431491280 is an apocalyptic number.

220431491280 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 220431491280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (496974441600).

220431491280 is an abundant number, since it is smaller than the sum of its proper divisors (773517391920).

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

220431491280 is a wasteful number, since it uses less digits than its factorization.

220431491280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 305899 (or 305890 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The spelling of 220431491280 in words is "two hundred twenty billion, four hundred thirty-one million, four hundred ninety-one thousand, two hundred eighty".