47809404 has 36 divisors (see below), whose sum is σ = 121814784. Its totient is φ = 15809472.

The previous prime is 47809393. The next prime is 47809427. The reversal of 47809404 is 40490874.

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×47809404² = 4571478221670432, which contains 22 as substring.

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 polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 657 + ... + 9800.

It is an arithmetic number, because the mean of its divisors is an integer number (3383744).

Almost surely, 2^47809404 is an apocalyptic number.

It is an amenable number.

47809404 is an abundant number, since it is smaller than the sum of its proper divisors (74005380).

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

47809404 is a wasteful number, since it uses less digits than its factorization.

47809404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10594 (or 10589 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 36.

The square root of 47809404 is about 6914.4344671130. The cubic root of 47809404 is about 362.9424583791.

The spelling of 47809404 in words is "forty-seven million, eight hundred nine thousand, four hundred four".