147281220 has 96 divisors (see below), whose sum is σ = 462672000. Its totient is φ = 38892672.

The previous prime is 147281191. The next prime is 147281231. The reversal of 147281220 is 22182741.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 56506 + ... + 59054.

It is an arithmetic number, because the mean of its divisors is an integer number (4819500).

Almost surely, 2^147281220 is an apocalyptic number.

147281220 is a gapful number since it is divisible by the number (10) 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 147281220, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (231336000).

147281220 is an abundant number, since it is smaller than the sum of its proper divisors (315390780).

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

147281220 is a wasteful number, since it uses less digits than its factorization.

147281220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2674 (or 2666 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 27.

The square root of 147281220 is about 12135.9474290226. The cubic root of 147281220 is about 528.0995421829.

The spelling of 147281220 in words is "one hundred forty-seven million, two hundred eighty-one thousand, two hundred twenty".