220638966240 has 384 divisors, whose sum is σ = 917483148288. Its totient is φ = 43150049280.

The previous prime is 220638966227. The next prime is 220638966269. The reversal of 220638966240 is 42669836022.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 220638966240.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 452742 + ... + 803898.

It is an arithmetic number, because the mean of its divisors is an integer number (2389279032).

Almost surely, 2^220638966240 is an apocalyptic number.

220638966240 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 220638966240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (458741574144).

220638966240 is an abundant number, since it is smaller than the sum of its proper divisors (696844182048).

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

220638966240 is a wasteful number, since it uses less digits than its factorization.

220638966240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351210 (or 351202 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 48.

The spelling of 220638966240 in words is "two hundred twenty billion, six hundred thirty-eight million, nine hundred sixty-six thousand, two hundred forty".