47638215 has 12 divisors (see below), whose sum is σ = 82572984. Its totient is φ = 25407024.

The previous prime is 47638189. The next prime is 47638243. The reversal of 47638215 is 51283674.

47638215 is a `hidden beast` number, since 4 + 7 + 638 + 2 + 15 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-47638215 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 47638215.

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, 529269 + ... + 529358.

It is an arithmetic number, because the mean of its divisors is an integer number (6881082).

Almost surely, 2^47638215 is an apocalyptic number.

47638215 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

47638215 is a deficient number, since it is larger than the sum of its proper divisors (34934769).

47638215 is a wasteful number, since it uses less digits than its factorization.

47638215 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1058638 (or 1058635 counting only the distinct ones).

The product of its digits is 40320, while the sum is 36.

The square root of 47638215 is about 6902.0442623907. The cubic root of 47638215 is about 362.5087496897.

The spelling of 47638215 in words is "forty-seven million, six hundred thirty-eight thousand, two hundred fifteen".