47809800 has 72 divisors (see below), whose sum is σ = 160567290. Its totient is φ = 12748800.

The previous prime is 47809789. The next prime is 47809823. The reversal of 47809800 is 890874.

It can be written as a sum of positive squares in 3 ways, for example, as 42693156 + 5116644 = 6534^2 + 2262^2 .

It is a tau number, because it is divible by the number of its divisors (72).

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

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 11481 + ... + 15080.

Almost surely, 2^47809800 is an apocalyptic number.

47809800 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47809800 is an abundant number, since it is smaller than the sum of its proper divisors (112757490).

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

47809800 is a wasteful number, since it uses less digits than its factorization.

47809800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26583 (or 26571 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 36.

The square root of 47809800 is about 6914.4631028013. The cubic root of 47809800 is about 362.9434604471.

The spelling of 47809800 in words is "forty-seven million, eight hundred nine thousand, eight hundred".