47678645 has 8 divisors (see below), whose sum is σ = 65387904. Its totient is φ = 32693904.

The previous prime is 47678623. The next prime is 47678647. The reversal of 47678645 is 54687674.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 47678645 - 2¹⁴ = 47662261 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 47678645.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47678647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681089 + ... + 681158.

It is an arithmetic number, because the mean of its divisors is an integer number (8173488).

Almost surely, 2^47678645 is an apocalyptic number.

It is an amenable number.

47678645 is a deficient number, since it is larger than the sum of its proper divisors (17709259).

47678645 is a wasteful number, since it uses less digits than its factorization.

47678645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1362259.

The product of its digits is 1128960, while the sum is 47.

The square root of 47678645 is about 6904.9724836526. The cubic root of 47678645 is about 362.6112730141.

The spelling of 47678645 in words is "forty-seven million, six hundred seventy-eight thousand, six hundred forty-five".