47728501 has 4 divisors (see below), whose sum is σ = 47742604. Its totient is φ = 47714400.

The previous prime is 47728481. The next prime is 47728511. The reversal of 47728501 is 10582774.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 44542276 + 3186225 = 6674^2 + 1785^2 .

It is a 3-Lehmer number, since φ(47728501) divides (47728501-1)³.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-47728501 is a prime.

It is a deceptive number, since it divides R_47728500.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (47728511) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1411 + ... + 9871.

It is an arithmetic number, because the mean of its divisors is an integer number (11935651).

Almost surely, 2^47728501 is an apocalyptic number.

47728501 is the 5641-st pentagonal number.

It is an amenable number.

47728501 is a deficient number, since it is larger than the sum of its proper divisors (14103).

47728501 is an equidigital number, since it uses as much as digits as its factorization.

47728501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14102.

The product of its (nonzero) digits is 15680, while the sum is 34.

The square root of 47728501 is about 6908.5816923591. The cubic root of 47728501 is about 362.7376192360.

The spelling of 47728501 in words is "forty-seven million, seven hundred twenty-eight thousand, five hundred one".