47609840 has 20 divisors (see below), whose sum is σ = 110693064. Its totient is φ = 19043904.

The previous prime is 47609813. The next prime is 47609869. The reversal of 47609840 is 4890674.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a Smith number, since the sum of its digits (38) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 47609794 and 47609803.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297482 + ... + 297641.

Almost surely, 2^47609840 is an apocalyptic number.

47609840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47609840 is an abundant number, since it is smaller than the sum of its proper divisors (63083224).

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

47609840 is a wasteful number, since it uses less digits than its factorization.

47609840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 595136 (or 595130 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 47609840 is about 6899.9884057874. The cubic root of 47609840 is about 362.4367610652.

The spelling of 47609840 in words is "forty-seven million, six hundred nine thousand, eight hundred forty".