47028649 has 4 divisors (see below), whose sum is σ = 47916036. Its totient is φ = 46141264.

The previous prime is 47028637. The next prime is 47028659. The reversal of 47028649 is 94682074.

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

It can be written as a sum of positive squares in 2 ways, for example, as 36820624 + 10208025 = 6068^2 + 3195^2 .

It is a cyclic number.

It is not a de Polignac number, because 47028649 - 2⁵ = 47028617 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (47028659) 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, 443614 + ... + 443719.

It is an arithmetic number, because the mean of its divisors is an integer number (11979009).

Almost surely, 2^47028649 is an apocalyptic number.

It is an amenable number.

47028649 is a deficient number, since it is larger than the sum of its proper divisors (887387).

47028649 is an equidigital number, since it uses as much as digits as its factorization.

47028649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 887386.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 47028649 is about 6857.7437251621. The cubic root of 47028649 is about 360.9559188354.

The spelling of 47028649 in words is "forty-seven million, twenty-eight thousand, six hundred forty-nine".