47309904 has 60 divisors (see below), whose sum is σ = 136979700. Its totient is φ = 15224832.

The previous prime is 47309893. The next prime is 47309947. The reversal of 47309904 is 40990374.

It can be written as a sum of positive squares in 2 ways, for example, as 20684304 + 26625600 = 4548^2 + 5160^2 .

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

It is a congruent number.

It is an unprimeable number.

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 11 ways as a sum of consecutive naturals, for example, 1489 + ... + 9840.

It is an arithmetic number, because the mean of its divisors is an integer number (2282995).

Almost surely, 2^47309904 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 47309904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68489850).

47309904 is an abundant number, since it is smaller than the sum of its proper divisors (89669796).

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

47309904 is a wasteful number, since it uses less digits than its factorization.

47309904 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11372 (or 11363 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 47309904 is about 6878.2195370604. The cubic root of 47309904 is about 361.6740551722.

The spelling of 47309904 in words is "forty-seven million, three hundred nine thousand, nine hundred four".