147556820 has 12 divisors (see below), whose sum is σ = 309869364. Its totient is φ = 59022720.

The previous prime is 147556751. The next prime is 147556853. The reversal of 147556820 is 28655741.

It can be written as a sum of positive squares in 2 ways, for example, as 15904144 + 131652676 = 3988^2 + 11474^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3688901 + ... + 3688940.

It is an arithmetic number, because the mean of its divisors is an integer number (25822447).

Almost surely, 2^147556820 is an apocalyptic number.

147556820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

147556820 is an abundant number, since it is smaller than the sum of its proper divisors (162312544).

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

147556820 is a wasteful number, since it uses less digits than its factorization.

147556820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7377850 (or 7377848 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 38.

The square root of 147556820 is about 12147.2968186342. The cubic root of 147556820 is about 528.4287390415.

The spelling of 147556820 in words is "one hundred forty-seven million, five hundred fifty-six thousand, eight hundred twenty".