47309820 has 24 divisors (see below), whose sum is σ = 132467664. Its totient is φ = 12615936.

The previous prime is 47309809. The next prime is 47309833. The reversal of 47309820 is 2890374.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394189 + ... + 394308.

It is an arithmetic number, because the mean of its divisors is an integer number (5519486).

Almost surely, 2^47309820 is an apocalyptic number.

It is an amenable number.

47309820 is an abundant number, since it is smaller than the sum of its proper divisors (85157844).

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

47309820 is a wasteful number, since it uses less digits than its factorization.

47309820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 788509 (or 788507 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 33.

The square root of 47309820 is about 6878.2134308264. The cubic root of 47309820 is about 361.6738411181.

The spelling of 47309820 in words is "forty-seven million, three hundred nine thousand, eight hundred twenty".