47722820 has 24 divisors (see below), whose sum is σ = 100643928. Its totient is φ = 19008000.

The previous prime is 47722789. The next prime is 47722823. The reversal of 47722820 is 2822774.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 21977344 + 25745476 = 4688^2 + 5074^2 .

It is not an unprimeable number, because it can be changed into a prime (47722823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131 + ... + 9770.

It is an arithmetic number, because the mean of its divisors is an integer number (4193497).

Almost surely, 2^47722820 is an apocalyptic number.

It is an amenable number.

47722820 is an abundant number, since it is smaller than the sum of its proper divisors (52921108).

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

47722820 is a wasteful number, since it uses less digits than its factorization.

47722820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10151 (or 10149 counting only the distinct ones).

The product of its (nonzero) digits is 12544, while the sum is 32.

The square root of 47722820 is about 6908.1705248206. The cubic root of 47722820 is about 362.7232267581.

The spelling of 47722820 in words is "forty-seven million, seven hundred twenty-two thousand, eight hundred twenty".