220278780 has 144 divisors (see below), whose sum is σ = 727927200. Its totient is φ = 53706240.

The previous prime is 220278767. The next prime is 220278823. The reversal of 220278780 is 87872022.

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 47 ways as a sum of consecutive naturals, for example, 98070 + ... + 100290.

It is an arithmetic number, because the mean of its divisors is an integer number (5055050).

Almost surely, 2^220278780 is an apocalyptic number.

220278780 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 220278780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363963600).

220278780 is an abundant number, since it is smaller than the sum of its proper divisors (507648420).

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

220278780 is a wasteful number, since it uses less digits than its factorization.

220278780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2284 (or 2279 counting only the distinct ones).

The product of its (nonzero) digits is 25088, while the sum is 36.

The square root of 220278780 is about 14841.7916708193. The cubic root of 220278780 is about 603.9359572756.

The spelling of 220278780 in words is "two hundred twenty million, two hundred seventy-eight thousand, seven hundred eighty".