47217528 has 48 divisors (see below), whose sum is σ = 133445520. Its totient is φ = 15054336.

The previous prime is 47217497. The next prime is 47217553. The reversal of 47217528 is 82571274.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 47217492 and 47217501.

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, 12601 + ... + 15912.

It is an arithmetic number, because the mean of its divisors is an integer number (2780115).

Almost surely, 2^47217528 is an apocalyptic number.

It is an amenable number.

47217528 is an abundant number, since it is smaller than the sum of its proper divisors (86227992).

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

47217528 is a wasteful number, since it uses less digits than its factorization.

47217528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28548 (or 28541 counting only the distinct ones).

The product of its digits is 31360, while the sum is 36.

The square root of 47217528 is about 6871.5011460379. The cubic root of 47217528 is about 361.4385035684.

The spelling of 47217528 in words is "forty-seven million, two hundred seventeen thousand, five hundred twenty-eight".