147720820 has 96 divisors (see below), whose sum is σ = 372556800. Its totient is φ = 48605184.

The previous prime is 147720817. The next prime is 147720821. The reversal of 147720820 is 28027741.

It is a super-2 number, since 2×147720820² = 43642881322944800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (147720821) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83101 + ... + 84859.

It is an arithmetic number, because the mean of its divisors is an integer number (3880800).

Almost surely, 2^147720820 is an apocalyptic number.

147720820 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 147720820, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (186278400).

147720820 is an abundant number, since it is smaller than the sum of its proper divisors (224835980).

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

147720820 is a wasteful number, since it uses less digits than its factorization.

147720820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1817 (or 1815 counting only the distinct ones).

The product of its (nonzero) digits is 6272, while the sum is 31.

The square root of 147720820 is about 12154.0454170618. The cubic root of 147720820 is about 528.6244381773.

The spelling of 147720820 in words is "one hundred forty-seven million, seven hundred twenty thousand, eight hundred twenty".