47878645 has 8 divisors (see below), whose sum is σ = 57503160. Its totient is φ = 38270400.

The previous prime is 47878639. The next prime is 47878667. The reversal of 47878645 is 54687874.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6084 + 47872561 = 78^2 + 6919^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 47878645 - 2¹⁹ = 47354357 is a prime.

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, 3795 + ... + 10495.

It is an arithmetic number, because the mean of its divisors is an integer number (7187895).

Almost surely, 2^47878645 is an apocalyptic number.

It is an amenable number.

47878645 is a deficient number, since it is larger than the sum of its proper divisors (9624515).

47878645 is a wasteful number, since it uses less digits than its factorization.

47878645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8135.

The product of its digits is 1505280, while the sum is 49.

The square root of 47878645 is about 6919.4396449424. The cubic root of 47878645 is about 363.1175869416.

The spelling of 47878645 in words is "forty-seven million, eight hundred seventy-eight thousand, six hundred forty-five".