47477840 has 20 divisors (see below), whose sum is σ = 110386164. Its totient is φ = 18991104.

The previous prime is 47477809. The next prime is 47477861. The reversal of 47477840 is 4877474.

It can be written as a sum of positive squares in 2 ways, for example, as 34199104 + 13278736 = 5848^2 + 3644^2 .

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

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 3 ways as a sum of consecutive naturals, for example, 296657 + ... + 296816.

Almost surely, 2^47477840 is an apocalyptic number.

47477840 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

47477840 is an abundant number, since it is smaller than the sum of its proper divisors (62908324).

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

47477840 is a wasteful number, since it uses less digits than its factorization.

47477840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 593486 (or 593480 counting only the distinct ones).

The product of its (nonzero) digits is 175616, while the sum is 41.

The square root of 47477840 is about 6890.4165331277. The cubic root of 47477840 is about 362.1014946936.

The spelling of 47477840 in words is "forty-seven million, four hundred seventy-seven thousand, eight hundred forty".