47643646 has 4 divisors (see below), whose sum is σ = 71465472. Its totient is φ = 23821822.

The previous prime is 47643643. The next prime is 47643647. The reversal of 47643646 is 64634674.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 47643599 and 47643608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47643643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11910910 + ... + 11910913.

It is an arithmetic number, because the mean of its divisors is an integer number (17866368).

Almost surely, 2^47643646 is an apocalyptic number.

47643646 is a deficient number, since it is larger than the sum of its proper divisors (23821826).

47643646 is a wasteful number, since it uses less digits than its factorization.

47643646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23821825.

The product of its digits is 290304, while the sum is 40.

The square root of 47643646 is about 6902.4376853399. The cubic root of 47643646 is about 362.5225251164.

The spelling of 47643646 in words is "forty-seven million, six hundred forty-three thousand, six hundred forty-six".