47720808 has 24 divisors (see below), whose sum is σ = 129244050. Its totient is φ = 15906912.

The previous prime is 47720807. The next prime is 47720809. The reversal of 47720808 is 80802774.

It is an interprime number because it is at equal distance from previous prime (47720807) and next prime (47720809).

It can be written as a sum of positive squares in only one way, i.e., 41757444 + 5963364 = 6462^2 + 2442^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (47720807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 331323 + ... + 331466.

Almost surely, 2^47720808 is an apocalyptic number.

It is an amenable number.

47720808 is an abundant number, since it is smaller than the sum of its proper divisors (81523242).

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

47720808 is a wasteful number, since it uses less digits than its factorization.

47720808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 662801 (or 662794 counting only the distinct ones).

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

The square root of 47720808 is about 6908.0248986233. The cubic root of 47720808 is about 362.7181292011.

The spelling of 47720808 in words is "forty-seven million, seven hundred twenty thousand, eight hundred eight".